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Chiara FIORONI
Professore Associato
Dipartimento di Scienze Chimiche e Geologiche - Sede Dipartimento di Scienze Chimiche e Geologiche
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Pubblicazioni
2024
- The transition from normal marine to evaporitic conditions recorded in a cold seep environment: The Messinian succession of Northern Italy
[Articolo su rivista]
Conti, S.; Argentino, C.; Bojanowki, M.; Fioroni, C.; Giunti, S.; Kremer, B.; Fontana, D.
abstract
2023
- The earliest evidence of deep-sea vertebrates
[Articolo su rivista]
Baucon, Andrea; Ferretti, Annalisa; Fioroni, Chiara; Pandolfi, Luca; Serpagli, Enrico; Piccinini, Armando; de Carvalho, Carlos Neto; Cachão, Mário; Linley, Thomas; Muñiz, Fernando; Belaústegui, Zain; Jamieson, Alan; Lo Russo, Girolamo; Guerrini, Filippo; Ferrando, Sara; Priede, Imants
abstract
: Vertebrate macroevolution has been punctuated by fundamental habitat transitions from shallow marine origins to terrestrial, freshwater, and aerial environments. Invasion of the deep sea is a less well-known ecological shift because of low fossilization potential and continual loss of abyssal fossil record by ocean floor subduction. Therefore, there has been a lack of convincing evidence of bottom-living vertebrates from pre-Paleogene deep seas. Here, we describe trace fossils from abyssal plain turbidites of the Tethys Ocean, which, combined with nannofossil dating, indicate that fishes have occupied the deep seafloor since at least the Early Cretaceous (Hauterivian-Barremian). These structures are identical to those produced by modern demersal fishes that feed by either scratching the substrate or expose their prey by water flow generated by suction or jetting. The trace fossils suggest activity of at least three fish species exploiting a productive abyssal invertebrate sediment fauna. These observations are consistent with Early Cretaceous vertebrate transition to the deep sea triggered by the availability of new food sources. Our results anticipate the appearance of deep-seafloor fishes in the fossil record by over 80 My while reassessing the mode of vertebrate colonization of the deep sea.
2022
- Messinian seep-carbonates marking the transition to the evaporite
deposits in the Romagna sector of the northern Apennines (Italy)
[Articolo su rivista]
Conti, S.; Fioroni, C.; Serventi, P.; Fontana, D.
abstract
2022
- The Eurasian epicontinental sea was an important carbon sink during the Palaeocene-Eocene thermal maximum
[Articolo su rivista]
Kaya, Mustafa Y.; Dupont-Nivet, Guillaume; Frieling, Joost; Fioroni, Chiara; Rohrmann, Alexander; Özkan Altıner, Sevinç; Vardar, Ezgi; Tanyaş, Hakan; Mamtimin &, Mehmut; Zhaojie, Guo
abstract
The Palaeocene-Eocene Thermal Maximum (ca. 56 million years ago) offers a primary analogue for future global warming and carbon cycle recovery. Yet, where and how massive carbon emissions were mitigated during this climate warming event remains largely unknown. Here we show that organic carbon burial in the vast epicontinental seaways that extended over Eurasia provided a major carbon sink during the Palaeocene-Eocene Thermal Maximum. We coupled new and existing stratigraphic analyses to a detailed paleogeographic framework and using spatiotemporal interpolation calculated ca. 720–1300 Gt organic carbon excess burial, focused in the eastern parts of the Eurasian epicontinental seaways. A much larger amount (2160–3900 Gt C, and when accounting for the increase in inundated shelf area 7400–10300 Gt C) could have been sequestered in similar environments globally. With the disappearance of most epicontinental seas since the Oligocene-Miocene, an effective negative carbon cycle feedback also disappeared making the modern carbon cycle critically dependent on the slower silicate weathering feedback.
2021
- Biomarker constraints on Mediterranean climate and ecosystem transitions during the Early-Middle Miocene
[Articolo su rivista]
Salocchi, Aura C.; Krawielicki, Julia; Eglinton, Timothy I.; Fioroni, Chiara; Fontana, Daniela; Conti, Stefano; Picotti, Vincenzo
abstract
2021
- Gas Hydrate destabilization and sea-level changes: insights from Miocene seep carbonate deposits of the northern Apennines (Italy).
[Relazione in Atti di Convegno]
Fontana, D.; Conti, S.; Fioroni, C.; Argentino, C.
abstract
2021
- Integrated calcareous nannofossil and magnetostratigraphic record of ODP Site 709: Middle Eocene to late Oligocene paleoclimate and paleoceanography of the Equatorial Indian Ocean
[Articolo su rivista]
Villa, G.; Florindo, F.; Persico, D.; Lurcock, P.; de Martini, A. P.; Jovane, L.; Fioroni, C.
abstract
We investigated the calcareous nannofossil biostratigraphy and magnetostratigraphy of middle Eocene – lower Oligocene sediments from ODP Hole 709 C, equatorial Indian Ocean. The new bio-magnetostratigraphic analyses have resulted in an accurate biochronology of the interval spanning Chrons C20r (middle Eocene) to C12r, in which 29 bioevents were investigated, in a 12 myr interval. The magnetostratigraphic signal is less clear across the Eocene-Oligocene transition (EOT) but becomes more reliable at the top of Chron C13n to Chron C12r (early Oligocene). Quantitative analyses of calcareous nannofossil assemblages allowed recognition of the Middle Eocene Climatic Optimum (MECO) and the long cooling trend leading to the glacial state starting in the early Oligocene. We identify two hiatuses, in the lower middle Eocene and across the Eocene-Oligocene Transition (EOT). Across the latter unconformity, a major transition from oligotrophic to eutrophic favoring nannofossil taxa highlights the enhanced sea surface nutrient availability during the transition to the early Oligocene glacial system. Finally, a late Oligocene warming event is recorded at this site by the increase in calcareous nannofossil taxa that preferred warm water.
2021
- Miocene Seep-Carbonates of the Northern Apennines (Emilia to Umbria, Italy): An Overview.
[Articolo su rivista]
Conti, S; Argentino, C; Fioroni, C; Salocchi, Ac; Fontana, D
abstract
2020
- Cretaceous Evolution of the Central Asian Proto‐Paratethys Sea: Tectonic, Eustatic, and Climatic Controls
[Articolo su rivista]
Yücel Kaya, Mustafa; Dupont‐nivet, Guillaume; Proust, Jean‐noël; Roperch, Pierrick; Meijer, Niels; Frieling, Joost; Fioroni, Chiara; Özkan Altiner, Sevinç; Stoica, Marius; Aminov, Jovid; Mamtimin, Mehmut; Guo3, Zhaojie
abstract
The timing and mechanisms of the Cretaceous sea incursions into Central Asia are still poorly
constrained. We provide a new chronostratigraphic framework based on biostratigraphy and
magnetostratigraphy together with detailed paleoenvironmental analyses of Cretaceous records of the
proto‐Paratethys Sea fluctuations in the Tajik and Tarim basins. The Early Cretaceous marine incursion in
the western Tajik Basin was followed by major marine incursions during the Cenomanian (ca. 100 Ma) and
Santonian (ca. 86 Ma) that reached far into the eastern Tajik and Tarim basins. These marine incursions
were separated by a Turonian‐Coniacian (ca. 92–86 Ma) regression. Basin‐wide tectonic subsidence analyses
imply that the Early Cretaceous sea incursion into the Tajik Basin was related to increased Pamir tectonism.
We find that thrusting along the northern edge of the Pamir at ca. 130–90 Ma resulted in increased
subsidence in a retro‐arc basin setting. This tectonic event and coeval eustatic highstand resulted in the
maximum observed geographic extent of the sea during the Cenomanian (ca. 100 Ma). The following
Turonian‐Coniacian (ca. 92–86 Ma) major regression, driven by eustasy, coincides with a sharp slowdown in
tectonic subsidence during the late orogenic unloading period with limited thrusting. The Santonian (ca.
86 Ma) major sea incursion was likely controlled by eustasy as evidenced by the coeval fluctuations in the
west Siberian Basin. An early Maastrichtian cooling (ca. 71–70 Ma), potentially connected to global Late
Cretaceous trends, is inferred from the replacement of mollusk‐rich limestones by bryozoan‐ and
echinoderm‐rich limestones.
2020
- Epicontinental seas as efficient carbon sinks: proto-Paratethys & West Siberian seas during the PETM
[Abstract in Atti di Convegno]
Kaya, Mustafa; Dupont-Nivet, Guillaume; Frieling, Joost; Fioroni, Chiara; Rohrmann, Alexander; Özkan Altıner, Sevinç; Vardar, Ezgi; Plessen, Birgit; Mamtimin, Mehmut; Zhaojie, Guo
abstract
Removal of carbon on geological timescales is generally assumed to be governed by the relative
strength of silicate weathering and organic carbon burial. For past transient warming phases
organic carbon burial has been considered as a relevant negative feedback, but it remains
uncertain how this compares to present-day anthropogenic emissions. The ocean is very effective
at organic carbon remineralization and, only certain regions bury significant amounts of organic
carbon. Organic carbon burial hotspots include shallow water regions along active continental
margins and permanently oxygen-deficient zones.
Shallow inland seas covering continents bear depositional settings with broad low-energy facies
and delivery of low-reactivity, fossil (ancient) and terrestrial (both contemporary and aged, i.e., soil)
organic carbon and lithogenic particles when they are associated with an active margin. These
epicontinental seas might be hydrographically and geographically restricted resulting in oxygendepleted environments. As such, epicontinental seas might serve as significant carbon sinks for all
types of organic carbon components (i.e. marine, fossil, contemporary and aged terrestrial) with a
high organic carbon preservation efficiency. However, oxygen deficient environments associated
with epicontinental seas are currently rare and, as a consequence, organic carbon burial may be
overestimated in importance as a negative feedback to anthropogenic emissions compared to the
past.
As part of the ERC “MAGIC” project, we study the mechanics, relative contribution and preservation
efficiency of ancient epicontinental seas as carbon sinks, using organic rich deposits dated to the
Paleocene – Eocene Thermal Maximum (PETM) from the proto-Paratethys and West Siberian seas.
We then calculate and compare the amount of organic carbon sequestered in these basins,
relative to modeled estimates of global organic carbon burial. Our data corroborates the view that
the sequestration of organic carbon arises due to enhanced recycling of phosphorus from
sediments under anoxic conditions and coupled increase in biological productivity. We estimate
ca. 1380 Gt C burial, plausibly more than half of the estimated global total excess burial across the
PETM is focused in the proto-Paratethys and West Siberian seas. This supports the hypothesis that
alongside the organic carbon burial on other continental margins, the proto-Paratethys and West
Siberian basins acted as significant carbon sinks, leading to the termination of the PETM. An
important implication of this is that, for the present-day and other periods in the geological past
with small epicontinental seas, the effectiveness of this negative carbon cycle feedback is likely
greatly diminished.
2020
- Geology of the High Sillaro Valley (Northern Apennines of Italy)
[Articolo su rivista]
Panini, Filippo; Bettelli, Giuseppe; Carlini, Mirko; Fioroni, Chiara; Nirta, Giuseppe; Remitti, Francesca
abstract
2020
- Preservation of 34S-enriched sulfides in fossil sulfate-methane transition zones: new evidence from Miocene outcrops of the northern Apennines (Italy)
[Articolo su rivista]
Argentino, C.; Johnson, J. E.; Conti, S.; Fioroni, C.; Fontana, D.
abstract
We provide new evidence of the preservation of 34S-enriched signals in methane seep-impacted sediments from two onshore Miocene outcrops located in the northern Apennines (Italy). Selected outcrops include methane-derived authigenic carbonates (MDAC) with δ13C composition between − 42.3 and − 18.2‰. MDACs contain chemosynthetic clams and abundant pyrite indicative of formation close to or within a shallow sulfate-methane transition zone (SMTZ). This study aims to evaluate the relative contributions of background organic matter mineralization and anaerobic oxidation of methane (AOM) to sulfate consumption and to gain insight into the transport process (i.e., diffusion, advection) controlling the depth of the SMTZ. Host sediments were investigated by CHN elemental analysis coupled with total sulfur (TS) and sulfur isotopic measurements on bulk samples. Total organic carbon (TOC) measurements reveal a consistent and low amount of organic carbon (TOC< 0.5%), with no notable difference between the underlying turbidites and the stratigraphic intervals hosting the MDACs. The TS/TOC ratio of most samples is well above the baseline value of deposition under normal marine conditions, suggesting the excess TS here is due to enhanced sulfate reduction. The samples show bulk δ34S values commonly enriched (> 0‰ and up to + 17.1‰), which is characteristic of sulfides precipitated in association with AOM. We propose that advection of methane-rich fluids was responsible for maintaining the shallow depth of the studied paleo-SMTZs. AOM at paleo-SMTZ positions in the investigated seep-impacted sediments resulted in excess bicarbonate and sulfide production, favoring solid-phase MDAC and iron sulfide precipitation.
2020
- The Oligocene-Miocene volcanism in the Apennine: discovery and characterization of baryte and phillipsite-Ba rich bed in the lower part of the Ranzano Formation (Reggio Emilia, Italy)
[Articolo su rivista]
Malferrari, D.; Gualtieri, A.; Panini, F.; Fioroni, C.
abstract
This work reports the biostratigraphic assessment and the
chemical and mineralogical characterization of a zeolitized and
barium-rich volcanic pyroclastic bed outcropping in the lower Secchia
Valley (Northern Apennines, Italy), very close to the boundary between
the Ranzano and the Monte Piano Formations. To our knowledge, it
is the older so far documented in the Emilian Epiligurian Succession
as, through nannofossil biostratigraphy, we have documented an early
Oligocene age (Rupelian CNO1 nannofossil zone) for the enclosing
sediments. The chemical and mineralogical composition, the latter
obtained through a multi-analytical approach combining X-ray powder
diffraction (Rietveld-RIR method) with thermal analyses coupled
with evolved gas mass spectrometry, revealed large amounts of Barich phillipsite, baryte, volcanic glass and subordinate quantities of
sanidine and plagioclase; on the other hand, phlogopite, idiomorphic
plagioclase and femic minerals, frequently found in younger volcanic
layers of the Ranzano Formation, here are absent. The quantitative
mineralogical assessment together with mineral associations suggest
that diagenesis did not play a relevant role in the crystallization of
phillipsite, but its role cannot be neglected for the crystallization of
baryte. Hypothesis on the genesis and transformation of the original
material and on the possible correlation with the coeval calc-alkaline
magmatic sources in the circum-Mediterranean area were considered,
but no definitive conclusion has been reached.
2019
- Biostratigraphic distribution of Miocene carbonates associated with gas hydrates in the northern Apennines (Italy) and their relationship with sea-level lowering
[Abstract in Atti di Convegno]
Fioroni, Chiara; Argentino, Claudio; Conti, Stefano; Fontana, Daniela
abstract
Gas hydrates are widespread in modern continental margins and their stability is related to temperature, pressure and availability of gas and water. Their sensitivity to tectonic activity and climate is still poorly constrained and more efforts are needed to understand how they respond to these forcing processes. Gas hydrates are frequently associated with carbonates, called clathrites, that may form bodies of large dimension and are marked by geochemical indicators such as 13C-depleted and enriched 18O values.
A number of Miocene seep-carbonates outcrop in different geological settings of the northern Apennines (Italy) (Argentino et al., 2019a), showing characters suggesting paleo-gas hydrate occurrence and then can be considered as clathrites. Our biostratigraphic investigation on the sediment enclosing gas-hydrate associated carbonates has shown that they are roughly concentrated in three main intervals: in the Langhian (subzone MNN5a), in the upper Serravallian-lower Tortonian (subzone MNN6b to zone MNN7) and the upper Tortonian-lowermost Messinian (zones MNN10 and MNN11). By comparing seep distributions with 3rd order eustatic curves of Haq et al. (1987), they seem to match phases of sea-level lowering.
The relationship among gas hydrate destabilization, climate change, sea-level variations, tectonic activity and fluid circulation, is particularly challenging in the fossil record. In the examined carbonates, a drop in the hydraulic pressure on the plumbing system during sea-level lowering would have shifted the base of the gas hydrate stability zone into shallower depths, inducing gas-hydrate destabilization. The uplift of the different sectors of the wedge-top foredeep system during tectonic migration could have increased the effect of the concomitant eustatic sea-level drop, reducing the hydrostatic load on the seafloor and inducing gas-hydrate decomposition.
In this view, a precise biostratigraphic framework of paleo-clathrites in the sedimentary record may help to shed light into gas-hydrates long-term evolution and their relation with sea level changes and tectonics.
2019
- Evidences for Paleo-Gas Hydrate Occurrence: What We Can Infer for the Miocene of the Northern Apennines (Italy)
[Articolo su rivista]
Argentino, C.; Conti, S.; Fioroni, C.; Fontana, D.
abstract
The occurrence of seep-carbonates associated with shallow gas hydrates is increasingly
documented in modern continental margins but in fossil sediments the recognition of gas hydrates
is still challenging for the lack of unequivocal proxies. Here, we combined multiple field and
geochemical indicators for paleo-gas hydrate occurrence based on present-day analogues to
investigate fossil seeps located in the northern Apennines. We recognized clathrite-like structures such
as thin-layered, spongy and vuggy textures and microbreccias. Non-gravitational cementation fabrics
and pinch-out terminations in cavities within the seep-carbonate deposits are ascribed to irregularly
oriented dissociation of gas hydrates. Additional evidences for paleo-gas hydrates are provided by
the large dimensions of seep-carbonate masses and by the association with sedimentary instability
in the host sediments. We report heavy oxygen isotopic values in the examined seep-carbonates up
to +6h that are indicative of a contribution of isotopically heavier fluids released by gas hydrate
decomposition. The calculation of the stability field of methane hydrates for the northern Apennine
wedge-foredeep system during the Miocene indicated the potential occurrence of shallow gas
hydrates in the upper few tens of meters of sedimentary column.
2019
- Fluid expulsion in accretionary wedges: what can we learn from
Miocene seep carbonates (Emilia and Tuscan Apennines, Italy)
[Capitolo/Saggio]
Fontana, D.; Conti, S.; Argentino, C.; Fioroni, C.
abstract
Seepage of hydrocarbon-rich fluids is a common process
in accre onary wedges where tectonic thickening and
underpla ng generate pore-fluid overpressures and
induce fluid migra on (Bohrmann et al., 2002; Gill et al.,
2005; Ding et al., 2010; Crutchley et al., 2015; Klaucke et
al., 2015). The migra on and expulsion of methane-rich
fluids promote the precipita on of a variety of authigenic
minerals on the seafloor or within the sediments, i.e.
carbonates (aragonite, calcite, dolomite), sulfides and
sulphates, forming crusts, concre ons and build-ups.
Reduced compounds in the fluids also sustain peculiar
microbial consor a and macrofaunal communi es
(Teichert et al., 2005; Campbell, 2006) (Fig. 1).
It is widely recognized that the most reliable indicators of
fossil cold seeps are the anomalously nega ve carbon
13 isotope composi on of the carbonates, with d C values as
low as -60‰ VPDB (Judd and Hovland, 2009), the peculiar
chemosynthe c bivalves (Lucinidae and Vesicomyidae)
and specific biomarkers (e.g. Taviani, 2014; Peckmann et
al., 2002; Grillenzoni et al., 2017).
In the northern Apennine orogenic belt, several outcrops
of authigenic carbonates tes fy for Miocene seepage
ac vity (Terzi et al., 1994; Dela Pierre et al., 2010; Con et
al., 2017). These carbonates show highly depleted d13C
signatures and host large chemosynthe c bivalve
assemblages (mainly giant lucinids)(Grillenzoni et al.,
2017), thus tes fying a long and complex history of
methane-rich fluid ven ng on the sea floor. Apenninic
carbonate deposits bearing fossil chemosynthe c fauna
have been found in various domains and basin types, from
wedge-top basins to the slope of the accre onary wedge,
and in the inner foredeep (Con and Fontana, 1999;
Argen no et al., 2019a) (Figs 2, 3).
In the following, we summarize and describe the main
features of the Apennine seep carbonates, from field
observa ons to geochemical features.
2019
- Methane-derived authigenic carbonates on accretionary ridges: Miocene case studies in the northern Apennines (Italy) compared with modern submarine counterparts
[Articolo su rivista]
Argentino, C.; Conti, S.; Crutchley, J. C.; Fioroni, C.; Fontana, D.; Johnson, J. E.
abstract
We present new field data from three outcrops of Miocene methane-derived authigenic carbonates in the
foredeep of the northern Apennines that contain chemosynthetic fauna and record a long history (∼1 Ma) of
shallow fluid seepage linked to seafloor anaerobic oxidation of methane. The studied outcrops show similar
features in terms of carbonate morphology, facies, spatial distribution and lateral and vertical contacts with the
enclosing sediments. Methane-derived carbonates occur in two structural positions: 1) on the slope of the accretionary
wedge in hemipelagites draping buried thrust-related anticlines, and 2) at the leading edge of the
deformation front in the inner foredeep, within fault-related anticlines standing above the adjacent deep seafloor
as intrabasinal ridges. We compare fossil seeps with two extensively investigated modern analogues: the
Hikurangi Margin, offshore New Zealand and Hydrate Ridge, on the Cascadia margin, offshore the U.S.A. These
analogues share a similar compressive structural setting and are marked by the presence of variably extensive
and voluminous methane-derived carbonate bodies and chemosynthetic fauna on the present-day seafloor. The
comparison allows us to propose a model for the evolution of fluid seeps on thrust-related ridges. At the deformation
front, uplift and geometry of the anticlinal ridges are controlled by the growth of splay faults, mostly
blind, connected to the basal detachment, favoring the migration of fluids toward the incipient anticline. Fold
development generates extensional stresses in the hinge zone of the anticline, promoting the development of
normal faults; fluid migration pathways and seafloor seeps shift from the forelimb toward the crest of the ridge
as the structures evolve. In the slope setting, far from the deformation front, thrust faults and extensional faults
in buried anticlines remain the main fluid migration pathways to sustain seepage at the seafloor. After reaching a
mature stage within the wedge, the structure is less active and buried in the slope environment of the evolved
2019
- Middle Eocene to Late Oligocene climate variability: A new integrated calcareous nannofossil and magnetostratigraphic record from the equatorial Indian Ocean
[Abstract in Atti di Convegno]
Fioroni, Chiara; Villa, Giuliana; Florindo, Fabio; Persico, Davide; Jovane, Luigi; Martini de Souza, Ana P.; Lurcock, Pontus C.
abstract
A new record of calcareous nannofossil biostratigraphy and magnetostratigraphy from the Middle Eocene to the Late
Oligocene allows the establishment of a precise biochronology and information about climatic variability in the equatorial Indian Ocean. The dataset compares Site 709 with results obtained from Site 711 (Fioroni et al., 2015).
This palaeoecological investigation, based on grouping taxa with similar responses to environmental conditions using statistical analysis, fi rst shows a response of the nannofossil assemblages to the Middle Eocene climatic optimum
with a short-lived increase in the abundance of warm-water taxa. This is followed by a long cooling trend that leads to
the greenhouse-icehouse change across the Eocene–Oligocene transition (EOT). Most notably, we documented a complete reorganisation in the nannofossil assemblages, shown by abundance variations in ecologically-signifi cant species
that preceded the onset of the EOT. This prominent change in the phytoplankton community is interpreted as a response
to increasing nutrients in the surface waters. The strengthened nutrient supply could be the result of a lowering sea level,
which in turn could be linked to ice-sheet expansion in East Antarctica and equatorial upwelling of the Subantarctic
Mode Water.
The response of the phytoplankton community to the Late Oligocene warming event was also recognised. A comparison with recent data (Dunkley Jones et al., 2008; Fioroni et al., 2015; Jones et al., 2019) makes possible the reconstruction of a basin-scale palaeoceanography of the low-latitude Indian Ocean.
2019
- Paleogene evolution and demise of the proto-Paratethys Sea in Central Asia (Tarim and Tajik basins): role of intensified tectonic activity at ~41 Ma
[Articolo su rivista]
Yücel Kaya, Mustafa; Dupont-Nivet, Guillaume; Proust, Jean-Noel; Roperch, Pierrick; Bougeois, Laurie; Meijer, Niels; Frieling, Joost; Fioroni, Chiara; Özkan Altıner, Sevinç; Vardar, Ezgi; Barbolini, Natasha; Stoica, Marius; Aminov, Jovid; Mamtimin, Mehmut; Zhaojie, Guo
abstract
The proto-Paratethys Sea covered a vast area extending from the Mediterranean Tethys to the Tarim Basin in western China during Cretaceous and Paleogene before it retreated westward and isolated into the Paratethys Sea during the Latest Eocene – Early Oligocene. Climate modelling and proxy studies suggest that Asian aridification has been governed by westerly moisture modulated by fluctuations of the proto-Paratethys Sea. Transgressive and regressive episodes of the proto-Paratethys Sea have been previously recognized but their timing, extent and depositional environments remain poorly constrained. This hampers understanding of their driving mechanisms (tectonic and/or eustatic) and their contribution to Asian aridification. Here, we present a new chronostratigraphic framework based on biostratigraphy and magnetostratigraphy as well as a detailed paleoenvironmental analysis for the Paleogene proto-Paratethys sea incursions in the Tajik and Tarim basins. This enables us to identify the major drivers of marine fluctuations and their potential consequences on Asian aridification. Seven facies associations characterizing specific depositional environments are interpreted as alluvial plain, coastal plain, restricted subtidal-bay, high energy shoal-beach, wave-dominated outer estuarine, offshore and hypersaline evaporitic shelf. A major regional restriction event, marked by the exceptionally thick (≤ 400 m) shelf evaporites is assigned a Danian-Selandian age (~63-59 Ma) in the Aertashi Formation. This is followed by the largest recorded marine incursion with a transgression estimated as early Thanetian (~59-57 Ma) and a regression within the Ypresian (~53-52 Ma) in the Qimugen Formation. The transgression of the next incursion in the Kalatar and Wulagen formations is now constrained as Early Lutetian (~47-46 Ma), whereas its regression in the Bashibulake Formation is constrained as Late Lutetian (~41 Ma) and is associated with a drastic increase in tectonic subsidence and basin infilling. The age of the last and smallest sea incursion restricted to the westernmost margin of the Tarim Basin is assigned as Bartonian–Priabonian (~39.7-36.7 Ma). We interpret the long-term westward retreat of the proto-Paratethys Sea starting at ~41 Ma to be associated with far-field tectonic effects of the Indo-Asia collision and Pamir/Tibetan plateau uplift. Short-term eustatic sea level transgressions are superimposed on this long-term regression and seem coeval with the transgression events in the other northern Peri-Tethyan sedimentary provinces for the 1st and 2nd sea incursions but not for the 3rd one thus related to tectonism. The transgressive and regressive intervals of the proto-Paratethys Sea correlate well with the reported humid and arid phases, respectively in the Qaidam and Xining basins, thus demonstrating the role of the proto-Paratethys Sea as an important moisture source for the Asian interior and its regression as a contributor to Asian aridification.
2018
- Constraining the fluid source of Miocene seep carbonates using radiogenic Sr isotopes (Corella outcrop, northern Apennines, Italy)
[Abstract in Atti di Convegno]
Argentino, Claudio; Lugli, Federico; Cipriani, Anna; Conti, Stefano; Fioroni, Chiara; Fontana, Daniela
abstract
Analisi isotopiche e biostratigrafiche su corpi carbonatici metanoderivati dell'Appennino settentrionale
2018
- Highly dinamic redox condition and fluid source identification in seep impacted sediments revealed by Mo-U enrichments, 87Sr/86SR and REE pattern (Miocene, Mugello outcrops, northern Apennines)
[Abstract in Atti di Convegno]
Argentino, C.; Lugli, F.; Cipriani, A.; Conti, S.; Fioroni, C.; Fontana, D.
abstract
cold seeps have been increasingly identified.....
2018
- Paleogene calcareous nannofossil biostratigraphic updates from equatorial Indian Ocean
[Abstract in Atti di Convegno]
Fioroni, C.; Villa, G.; Florindo, F.
abstract
Biostratigrafia e paleoceanografia di sedimenti provenienti dall'Oceano indiano equatoriale
2018
- Sand Liquefaction Phenomena During the Seismic Crisis of May 2012 in Emilia, Northern Italy
[Articolo su rivista]
Lugli, Stefano; Fontana, Daniela; Marchetti, Dori Simona; Fioroni, Chiara; Bertolini, Giovanni
abstract
In May 2012, the Emilia region of the Po Valley was struck by a seismic crisis with two major events of magnitude Mw6.1 and Mw5.9. The first event induced widespread sand blows formed along buried channels and old crevasse splay deposits. In the days immediately following the events, the detailed mapping and sampling of the erupted sand was fundamental to record all the seismically-induced phenomena. The study of a trench dug across large fractures at San Carlo (Ferrara) provided also valuable information on the sand blows mechanism and regome. The sedimentological and compositional characteristics of the fracture-filling materials indicate that the sands were erupted from a layer located between 6.8 and 7.5 m depth. Older and deeper Holocene and Pleistocene sand layers were not apparently involved in the liquefaction phenomena.
2017
- Correlating shelf carbonate evolutive phases with fluid expulsion episodes in the foredeep (Miocene, northern Apennines, Italy)
[Articolo su rivista]
Conti, Stefano; Fioroni, Chiara; Fontana, Daniela
abstract
In the Miocene of the northern Apennines of Italy, evolutionary phases of shallow-water carbonates in
wedge-top basins are coeval with methane-rich fluid expulsion episodes in the inner foredeep. We
identified four main correlative events, primarily controlled by synsedimentary tectonics, sediment input
and climate cooling: 1) a Burdigalian tectonic phase determined the onset of shelfal sedimentation in
wedge-top areas and is correlated with an important episode of fluid expulsion in marly sediments of the
inner foredeep (Croce di Moggiona seep-carbonates); 2) the decrease of shelfal carbonate production and
the increase of detrital input in the Early Langhian correspond with a second important episode of seepcarbonate
precipitation in the inner foredeep (Castagno d'Andrea); 3) the demise of the carbonate shelf
and the coeval expulsion of methane-rich fluids in the inner foredeep (Vicchio and M. Citerna seepcarbonates)
at the Langhian/Serravallian boundary approximate the Mi3b cooling event. The lower
temperatures, associated with increased siliciclastic weathering, led to the crisis of shallow-water carbonate
production whereas the pressure drop due to the eustatic fall may have triggered the gas-charged
fluid expulsion; 4) the tectonic-related uplift of frontal sectors of the wedge-top basin led to the wide
erosion of the Burdigalian-Langhian carbonates and caused the precipitation of authigenic seepcarbonates
(Deruta seep) both in the slope and the adjacent foredeep.
2017
- MIOCENE SEDIMENTARY INSTABILITIES ASSOCIATED WITH
METHANE DERIVED AUTHIGENIC CARBONATES: A NEW CASE
STUDY FROM THE NORTHERN APENNINES (PALAZZUOLO
OUTCROPS, ITALY)
[Abstract in Atti di Convegno]
Argentino, Claudio; Johnson, Joel; Conti, Stefano; Fioroni, Chiara; Fontana, Daniela
abstract
Northern Apennines (Italy) host several outcrops of methane derived seep carbonates often associated
with sedimentary instabilities such as intraformational slumps, extraformational slides and diapiric
processes. Despite the vast body of literature on seep-deposits from the Monferrato to the Umbro-Tuscan
sectors of the mountain chain, only a few studies focus on the interplay between paleomethane seepage and
sedimentary instabilities (Conti and Fontana, 2002) because of the lack of good exposures.
In this study we investigate an outcrop located in the Mugello area of the Tuscan Apennines (Prati
Piani di Palazzuolo) characterized by the co-occurrence of methane derived authigenic carbonates,
chemosynthetic fauna and slump-like structures. The examined outcrop consists of several carbonate blocks
with max length of 3.5 m enclosed in a 100 m thick pelitic interval, interpreted as sedimentation above a
structural high in the inner foredeep at the front of the Middle Miocene accretionary wedge.
The blocks are mainly located at the base of the pelitic interval and have the same strike as the
enclosing sediments. At various levels, pelitic sediments show soft sediment deformation structures (folds,
slumps). Within the slumps, we sampled some concretions (silty-carbonate in composition).
The δ13C value in the carbonates ranges between -18.2‰ and -33.22‰, confirming they are methane
derived (AOM-related in origin). Pelites surrounding the carbonate blocks (in situ or transported for a short
distance. Isotopic δ18O values are comprised between -4.31‰ and 0.87‰. The concretions are slightly
depleted in 13C (-5.47‰; -10.95‰).
Preliminary data suggest the presence of a seepage system active before the onset of the instability
and able to sustain chemosynthetic communities at the seafloor. The interstitial overpressures might have
reduced the shear strength of the fine-grained sediments and constituted an important preconditioning factor
for diapiric or mass-transport structures. However, this conclusion is still speculative and needs further
investigation.
2017
- Miocene seep-impacted sediments and authigenic carbonates of the Mugello area (northern Apennines, Italy): new insights from facies, stable isotopes and CHN analyses
[Poster]
Argentino, Claudio; Johnson, J. E.; Conti, Stefano; Fioroni, Chiara; Fontana, Daniela
abstract
Reconstructing seepage dynamics and geochemical conditions that created massive authigenic carbonate precipitation and sustained chemosynthetic fauna on the seafloor at the studied site during the Langhian period of the Miocene.
2017
- Paleoenvironmental evolution in a high-stressed cold-seep system (Vicchio Marls, Miocene, northern Apennines, Italy)
[Articolo su rivista]
Grillenzoni, Claudia; Monegatti, Paola; Turco, Elena; Conti, Stefano; Fioroni, Chiara; Fontana, Daniela; Salocchi, AURA CECILIA
abstract
Excellent exposures of Miocene seep-carbonates enclosed in marine marly sediments (Vicchio outcrops in the
northern Apennines, Italy) offer the opportunity to highlight the evolution of a fossil seep ecosystem and the
response of benthic communities to high-stressed environmental conditions. For this purpose, seep-related facies
and molluscs within carbonate bodies have been studied, coupled with benthic foraminiferal assemblages and
carbon and oxygen isotopes in the enclosing marls. The integrated planktonic foraminiferal and calcareous
nannofossil biostratigraphy has allowed us to constrain the seepage within well-calibrated bioevents and to
stress the relationships with paleoclimatic and paleoceanographic variations during the middle Miocene in the
Mediterranean area. Our biostratigraphic data indicate that the onset of the seepage approximates the Mi3b
cooling event (13.82 Ma) and the seepage system lasts for 400 kyr. The evolution of the Vicchio cold-seep system
passes through four phases: (1) The onset of the seepage, characterized by a pervasive flow of methane-rich
fluids, is inferred by δ13C depletion of marly sediments and by prevailing benthic foraminifera indicative of
suboxic conditions at the sea-floor. (2) The methane flow becomes focused causing the precipitation of wide
pinnacle-like carbonate bodies which contain giants lucinids. Enclosing marls indicate well-oxygenated conditions,
possibly enhanced by paleoceanographic variations connected to the Mi3b cooling event. (3) The appearance
of the vesicomyid Christineconcha cf. C. regab and the absence of lucinids in seep-carbonates suggest
stable methane-rich fluid emissions; higher flow rates locally favoured the flourishment of bacterial mats.
Benthic foraminifera show abundance peaks of organic matter depending taxa. (4) The reduced intensity of
methane-rich fluid flows favours the precipitation of stratiform carbonate bodies along strike; the macrofauna is
characterized by the presence of both Vesicomyidae and giant lucinids. Foraminiferal assemblages in the enclosing
marls indicate the restoration of well-oxygenated conditions.
2017
- RECONSTRUCTING SEEPAGE DYNAMICS OF A MIOCENE SYSTEM
THROUGH SEDIMENTOLOGICAL AND GEOCHEMICAL
CHARACTERIZATION OF AUTHIGENIC CARBONATES AND HOST
SEDIMENTS (CORELLA, NORTHERN APENNINES, ITALY)
[Abstract in Atti di Convegno]
Argentino, Claudio; Johnson, Joel; Conti, Stefano; Fioroni, Chiara; Fontana, Daniela
abstract
New data from facies, stable isotopes (C and O) and CHN analyses on seep-impacted sediments and
authigenic carbonates provided insights into dynamics and geochemical background conditions at a Miocene
seepage system (Corella outcrops, northern Apennines, Italy).
The examined outcrops comprise 4 lenticular carbonate bodies with maximum length of 200 m and
thickness up to 12 m. These carbonates strike parallel to the bedding of the enclosing sediments and show
lateral pinch out terminations. Chemosynthetic fauna (mainly Lucinids and Vesycomids) are very common
and forms local concentrations of disarticulated or articulated shells; veins and conduits crosscut the
carbonate bodies. Microfacies show mottled micrite including clotted textures related to bacterial activity
and framboids of pyrite (rosette-like features observed at SEM). δ13C values of the carbonates (micrites and
sparry cement filling veins) range between -42.32‰ to -26.63‰ and are indicative of AOM. The δ18O range
between -5.67‰ to 1.13‰ (average -0.96‰) and is close to the Miocene seawater signature and therefore
considered unaffected by significative diagenetic alteration. The host sediments at the top of the carbonates
body is depleted in 13C compared to normal marine carbonates and range between -8.40‰ to -4.75‰ and
δ18O is comprised between -3.50‰ and 1.68‰. CHN analyses on the enclosing sediments revealed low TOC
values in the range 0.21-0.72% with an average of 0.37%, similar to other Miocene foredeep successions of
the northern Apennines. The atomic C/N ratio ranges from 8.93 to 14.05 (avg. 10.84) suggesting minor
admixture of land-derived and marine organic carbon.
We suggest, based on field data, geotectonic setting, and geochemical analysis, that a blind fault,
rooted in the underlyingTertiary turbidites, acted as a pathway for deep methane-rich fluids. Advective fluid
flow resulted in a shallow, near seafloor sulfate-methane transition zone (SMTZ), resulting in the anaerobic
oxidation of methane and the precipitation of massive authigenic carbonate. The presence and preservation
of chemosynthetic fauna throughout the authigenic carbonate body indicates much of the advective fluid
flow breached the seafloor, resulting in methane seepage that helped sustain these chemosynthetic
organisms
2017
- STRONTIUM ISOTOPE STRATIGRAPHY AS A CONTRIBUTION FOR DATING
MIOCENE SHELF CARBONATES (S. MARINO FM., NORTHERN APENNINES)
[Articolo su rivista]
Argentino, Claudio; Reghizzi, Matteo; Conti, Stefano; Fioroni, Chiara; Fontana, Daniela; Salocchi, AURA CECILIA
abstract
This paper provides new data on strontium isotope stratigraphy applied to the Miocene heterozoan
shelfal carbonates of the S. Marino Fm. (Marecchia Valley, northern Apennines). Sr isotopic analyses were
carried out on oyster shells, bryozoans and bulk-rocks from the lower-middle carbonate portion of the section.
In the upper part of the succession that shows evidence of detrital influx, 87Sr/86Sr analyses were performed on
foraminifera tests, separating planktonic and benthic forms. Results were compared with calcareous nannofossil
biostratigraphic data from the same levels, in order to test the reliability of Sr dating in mixed carbonate-siliciclastic
sediments. Mean ages obtained from oysters range between 16.9 Ma and 16.3 Ma. Very similar results are obtained
using bryozoans (16.5 Ma to 16.1 Ma) and bulk-rocks (16.8 Ma to 16.2 Ma). These results allow to better constrain
the age of the massive carbonate shelf, referable to the upper Burdigalian. In the upper carbonate-siliciclastic portion
of the shelf, numerical ages obtained from planktonic and benthic foraminifera are in good agreement with
nannofossil biozones (mean ages respectively around 15.3 Ma and 14.5 Ma) although they display wide confidence
intervals. These wide age uncertainties depend on the slow rate of change of marine 87Sr/86Sr through time that
characterizes the interval between ~15 and ~13.5 Ma.
2017
- The Cretaceous – Paleogene paleogeography of Central Asia recorded in depositional environments of the Proto-Paratethys Sea in the Tarim Basin (Western China)
[Abstract in Atti di Convegno]
M. Y., Kaya; G., Dupont Nivet; J. N., Proust; L., Bougeois; N., Meijer; J., Frieling; Fioroni, Chiara; M., Stoica; P., Roperch; M., Mamtimin; J., Aminov
abstract
The Proto-Paratethys, a shallow epicontinental sea, extended from Cretaceous to Paleogene times across Eurasia
from the Mediterranean Tethys to the Tarim Basin in western China. Transgressive and regressive episodes of
the Proto-Paratethys Sea have been previously recognized but their timing, extent and depositional environments
remain poorly constrained especially for the Cretaceous and early Paleogene. This hampers understanding of their
driving mechanisms (geodynamic and/or eustatic) and paleoclimatic consequences on regional aridification and
monsoons.
As part of the ERC “MAGIC” project, we report an integrated sedimentologic and stratigraphic analysis of the
Proto-Paratethys from its initial Cretaceous onset to the final Paleogene retreat from multiple investigated sections
in the western border of Tarim Basin. Facies associations include field observations and microfacies analyses from
carbonate samples. New bio- and magneto-stratigraphic results from key intervals are also provided to testify the
previously constructed regional stratigraphic framework.
The previously controversial number of marine incursions in the Tarim Basin is resolved to 6 (3 Cretaceous and 3
Paleogene) also recognized in the neighboring Tajik and Turan Basins to the west and the present-day Alai Valley.
The eastward extent of these marine incursions varied through time with a maximum extent during late Paleocene
- early Eocene. The first marine incursion is a Cenomanian transgression recorded in the marls and calcareous
mudstones of the Kukebai Formation. The next two are Coniacian and Campanian transgressions recognized in
the carbonate units of the Yigeziya Formation. The first Paleogene incursion is characterized by thick evaporites
of the Paleocene Aertashi Formation overlain by the marine shales of the Lower Qimugen Formation. The
latter represents the maximum extent and the deepest environments of the Proto-Paratethys. The marine Kalatar
limestones and silty shales of the Wulagen Formation are associated with the penultimate transgression whereas
the silty shales of the Bashibulake Formation were laid down during the last smaller marine incursion.
Generally, transgressive intervals are composed of restricted marine bay environments, shoal & oyster-rich
bioherms giving rise to upper offshore to shoreface transition silty shales. The regressive intervals are composed of
intertidal flats, supratidal sabkhas and salinas, fluvial, playa and lake environments of alluvial plain. The temporal
and spatial extent of the transgressive and regressive intervals enable to discriminate the major drivers of marine
fluctuations with their potential consequences on Asian aridification and monsoons.
2016
- Depositional history of the Epiligurian wedge-top basin in the Val Marecchia area
(northern Apennines, Italy): a revision of the Burdigalian-Tortonian succession
[Articolo su rivista]
Conti, Stefano; Fioroni, Chiara; Fontana, Daniela; Grillenzoni, Claudia
abstract
The Burdigalian-Tortonian Epiligurian succession in the Val Marecchia area comprehends different
lithostratigraphic units deposited in a wedge-top basin during the northeastern migration of the
thrust belt. The succession includes shallow-water carbonates passing to mixed carbonatesiliciclastic
and to fine-grained pelitic sediments, capped by fluvio-deltaic coarse-grained deposits.
Detailed field work and stratigraphy has allowed to characterize depositional units and
unconformities and to delineate the sedimentary and tectonic evolution of the basin. Tectonics
exerted a primary control at different stages. During the Burdigalian, a general uplift of the area
allowed the onset of shelfal carbonate sedimentation on underlying Ligurian and Epiligurian deepwater
sediments. At the Serravallian the sedimentation was influenced by the thrust reactivations
which caused a marked asymmetry in the basin geometry and fill. The subsidence increase in the
rear part of the basin determined the deposition of a thick succession of relatively deep fine-grained
sediments (up to 800 m water-depth) (Serravallian, MNN6a through MNN6b subzones based on
nannofossil biostratigraphy) and fossiliferous clays (lower Tortonian, biozones MNN8b-MNN9).
Conversely, uplift is activated in the frontal part of the basin, causing the partial erosion of the
Burdigalian–Langhian shallow-water carbonates. A relevant amount of this carbonate detritus is
delivered to the foredeep, supplying the Marnoso-arenacea Fm. A general uplift of the area in the
late Tortonian leads to the deposition of fluvio-deltaic conglomerates supplied by emerged rear
sectors of the basin.
2016
- I vulcani di fango più spettacolari d’Italia: visita guidata alle Salse di Nirano (Appennino Modenese); The most spectacular mud volcanoes in Italy:
guided tour to the “Salse di Nirano” (Modena Apennine)
[Articolo su rivista]
Castaldini, Doriano; Fioroni, Chiara; Soldati, Mauro
abstract
The natural reserve of Salse di Nirano is an “integrated area” located in a hilly area of the Modena Apennine margin. The area is characterized by cold emissions of mud due to the ascent to the surface of salty and muddy waters mixed with methane and fluid hydrocarbons. Such emissions give rise to characteristic mud ejection structures. The shape of the ejection is related to the density of the mud and may result in cones if the mud is very dense or in levelpool if it is fluid. The “salse” are located in a sub-circular depression caused by a gravitational collapse related to the mud ejected. The protected area has been declared a “Site of Community Importance” and has had the recognition of “Geosite” for the protection of the cultural heritage of our country. The Reserve welcomes over 70.000 visitors a year who can visit the area by means of equipped paths provided with explanatory panels and a tourist-environmental map of the area, that combines the main geological and geomorphological aspects with tourist information.
2016
- Vesuvio, il monte addormentato: percorso didattico alla scoperta di una collezione storica del Liceo classico Virgilio di Mantova
[Articolo su rivista]
Vecchia, I.; Accordi, S.; Bertacchini, M.; Fioroni, C.
abstract
2015
- Cenozoic evolution of the Pamir plateau recorded in surrounding basins, implications on Asian climate and land-sea distribution.
[Abstract in Atti di Convegno]
Dupont Nivet, Guillaume; Wei, Yang; Tamsin, Blayney; Jean Noel, Proust; Zhaojie, Guo; Arjen, Grothe; Oleg, Mandic; Fioroni, Chiara; Laurie, Bougeois; Yanina, Najman
abstract
2015
- Factors controlling the evolution of a wedge-top temperate-type carbonate platform in the Miocene of the northern Apennines (Italy)
[Articolo su rivista]
Fontana, Daniela; Conti, Stefano; Fioroni, Chiara; Grillenzoni, Claudia
abstract
An integrated study including stratigraphy, composition and biostratigraphy was performed on temperate-type shallow-water carbonates of early middle Miocene age deposited in a wedge-top basin within the Apenninic chain (Romagna-Tuscan area). The succession rests unconformably on the deep-water sediments of allochthonous Ligurian units and is represented by up to 350 m thick carbonates and mixed siliciclastic-carbonate rocks. Two main units are recognized, each characterized by a distinct facies association. The basal unit (upper Burdigalian) consists of rhodalgal rudstones and packstones of shelf environment, dominated by echinoids, bryozoans, coralline algae and benthic foraminifera, deposited in temperate conditions and showing a transgressive pattern. It gradually passes into mixed carbonate-siliciclastic shallow water-facies, (Langhian in age) characterized by an increase in terrigenous components and planktonic and benthic taxa. Sediment starvation during the Langhian is suggested by the occurrence of glaucony-rich packstones with abundant planktonic foraminifera. The succession grades upwards into upper Langhian-lower Serravallian planktonic foraminifera-rich marls. Increasing detrital discharge and water depth up section result in drowning of the carbonate shelf. Debris-flow deposits including material of extraformational origin are intercalated at different levels, in particular from the uplifting south-western margins, close to the Ligurian thrusts. The inception and demise of these temperate rhodalgal-foramol carbonate sediments located in a wedge-top Epiligurian basins is primarily controlled by synsedimentary tectonics, which in turn affects relative sea-level rise, and nutrient and detrital input. In particular, tectonics controlled the initial stage of the transgression, determining the configuration of the basin, subdivided in narrow submerged palaeotopographic lows and relatively elevated areas. Synsedimentary tectonics related to the thrust migration was also the main controlling factor in the demise of carbonate sedimentation, through the combined effect of two processes: increasing the subsidence of the basin, and triggering the terrigenous discharge from the erosion of the uplifted Apenninic relieves
2015
- Inception and crisis of a Miocene temperate-type carbonate shelf in a compressive setting (northern Apennines)
[Abstract in Atti di Convegno]
Salocchi, AURA CECILIA; Fontana, Daniela; Conti, Stefano; Fioroni, Chiara; Grillenzoni, Claudia; Argentino, Claudio
abstract
A detailed study including stratigraphy and composition has been performed on shallow-water carbonates of early-middle Miocene age deposited in a wedge-top basin in the northern Apennines. In the representative outcrop of Torriana (Val Marecchia valley, Romagna Apennines) more than 140 samples were collected in order to identify factors controlling the inception and crisis of the shelf.
The succession unconformably rests on the allochthonous Ligurian units and is constituted by up to 100 m thick carbonates and mixed siliciclastic-carbonate rocks. The basal portion consists of rhodalgal rudstones and grainstones dominated by echinoids, bryozoans, coralline algae and benthic foraminifera. It gradually passes into mixed carbonate-siliciclastic shallow water-facies, characterized by an increase in terrigenous components and planktonic and benthic taxa. The occurrence of glaucony-rich packstones with abundant planktonic foraminifera marks the transition to the upper fine-grained sediments.
Results of a detailed compositional study evidence four main phases in the platform evolution, and a progressive decreasing of the carbonate productivity, gradually replaced by detrital sedimentation.
Regional factors linked to the Apenninic tectonics seem to primarily support the eu- to mesotrophic conditions in the examined carbonate shelf. However this time interval (late Burdigallian - Serravallian) is characterized by the global fertility event, the Monterey Event, recorded also in the Mediterranean. The stable isotope study shows that this global event also influenced the carbonate production.
The inception and demise of these temperate rhodalgal-foramol carbonate sediments located in a wedge-top basin is primarily controlled by synsedimentary tectonics related to the thrust migration, through the combined effect of two processes: increasing the subsidence of the basin, and triggering the terrigenous discharge from the erosion of the uplifted Apenninic areas.
2015
- Integrated bio-magnetostratigraphy of ODP Site 709 (equatorial Indian Ocean).
[Abstract in Atti di Convegno]
Villa, Giuliana; Fioroni, Chiara; Florindo, Fabio
abstract
Over the last decade, calcareous nannofossil biostratigraphy of the lower Eocene-Oligocene sediments has shown
great potential, through identification of several new nannofossil species and bioevents (e.g. Fornaciari et al., 2010;
Bown and Dunkley Jones, 2012; Toffanin et al., 2013). These studies formed the basis for higher biostratigraphic
resolution leading to definition of a new nannofossil biozonation (Agnini et al., 2014). In this study, we investigate
the middle Eocene-lower Oligocene sediments from ODP Hole 709C (ODP Leg 115) by means of calcareous
nannofossils and magnetostratigraphy.
Ocean Drilling Program (ODP) Site 709 was located in the equatorial Indian Ocean and biostratigraphy has been
investigated in the nineties (Okada, 1990; Fornaciari et al., 1990) while paleomagnetic data from the Initial Report
provided only a poorly constrained magnetostratigraphic interpretation, thus the cored succession was dated only
by means of biostratigraphy.
Our goal is to test the reliability in the Indian Ocean of the biohorizons recently identified at Site 711 (Fioroni et
al., in press), by means of high resolution sampling, new taxonomic updates, quantitative analyses on calcareous
nannofossils allowed to increase the number of useful bioevents and to compare their reliability and synchroneity.
The new magnetostratigraphic analyses and integrated stratigraphy allow also to achieve an accurate biochronology
of the time interval spanning Chrons C20 (middle Eocene) and C12 (early Oligocene).
In addition, this equatorial site represents an opportunity to study the carbonate accumulation history and the
large fluctuations of the carbonate compensation depth (CCD) during the Eocene (e.g. Pälike et al., 2012). The
investigated interval encompasses the Middle Eocene Climatic Optimum (MECO), and the long cooling trend
that leads to the Oligocene glacial state. By means of our new bio-magnetostratigraphic data and paleoecological
results we provide further insights on nannofossil assemblage response to the paleoclimatic changes that led to the
Oligocene glacial state
2015
- Middle Eocene-Lower Oligocene calcareous nannofossil biostratigraphy and paleoceanographic implications from Site 711 (equatorial Indian Ocean)
[Articolo su rivista]
Fioroni, Chiara; Villa, Giuliana; Persico, Davide; Jovane, Luigi
abstract
Nannofossil data from ODP Site 711 (equatorial Indian Ocean) yield a set of consistent, reliable biohorizons
that form the basis of a revised calcareous nannofossil biostratigraphy for the low-latitude Eocene-Oligocene.
We discuss 31 biohorizons occurring over an 11 myr time interval which we correlate to previous
magnetostratigraphic data. Calcareous nannofossils from the middle Eocene through the lower Oligocene of
the studied section are characterized bymoderately well preserved assemblages consisting largely of lowlatitude
and cosmopolitan species.
A significant nannofossil dissolution interval is evidenced at the middle Eocene Climatic Optimum (MECO).
We document a significant increase in late Eocene nannoplankton exhibiting a eutrophic preference. Analysis
of the assemblage suggests important changes in the equatorial oceanic regime just before the onset of the
Eocene-Oligocene transition (EOT), that foreshadow the more dramatic climatic shift of the early Oligocene.
2014
- Antarctic glacial history and Southern Ocean productivity during the Middle Eocene - Late Oligocene
[Articolo su rivista]
Villa, G.; Fioroni, Chiara; Persico, D.; Roberts, A. P.; Florindo, F.
abstract
Paleoclimatology and Paleoceanography of the Southern Ocean
2014
- Cold-seep carbonates as tracers for the evolution of the platform-basin system in the Miocene of the northern Apennines (Italy)
[Abstract in Atti di Convegno]
Salocchi, AURA CECILIA; Fontana, Daniela; Conti, Stefano; Fioroni, Chiara; Grillenzoni, Claudia
abstract
The peculiar methane-derived carbonates enclosed in pelitic and marly deposits of the Miocene inner foredeep
in the northern Apennines are useful tracers for an evaluation of tectonic and sedimentary processes in the
Miocene shelf-slope-basin system in a compressive geodynamic context. The carbonate precipitation is related
to emissions of hydrocarbon-rich fluids and it is controlled by: - tectonic events (tectonics constrains the
plumbing system, with faults and fractures serving as conduits and channelling water and methane up to the
seafloor); - climatic events (carbonate formation seems to correlate with cold periods and sea-level low-stand).
The correlation between methane-derived carbonates and climate during the Miocene in the northern Apennines
has been suggested by recent results (Fontana et al,. 2013) of a sedimentological and biostratigraphic study of
seep-carbonates and the enclosing hemipelagic Vicchio marls. The study suggests a correlation between the
carbonate precipitation and the middle Miocene cooling event (Mi3b). The ascent and emission of methane-rich
fluids may have been triggered by the pressure drop due to the eustatic fall. A detailed study of the δ18O record
of carbonates and δ13C of total organic matter in enclosing marls has been performed in order to verify a
correlative trend in correspondence of the climatic cooling event. A palaeocological study has allowed to check
the influence of these stressed environmental conditions on benthic foraminifera assemblages. Therefore
morphological, textural, biostratigraphic, geochemical studies could allow to characterize seep-carbonates
related to climatic event. Results of this study could contribute to the reconstruction of transgressive-regressive
events in the adjacent temperate-type carbonate platforms, as well as the definition of modes and rates of the
demise of carbonate deposition and the onset of clastic sedimentation.
The identification of cold phases and lowering of sea level in slope-basinal deposits and their detailed timing,
may be an useful and innovative tool for correlation with coeval shallow-water successions, and for the
reconstruction of the evolution of the Miocene platform-basin system in the compressive setting of the northern
Apennines.
2014
- Middle Eocene to Late Oligocene Antarctic Glaciation/Deglaciation and Southern Ocean productivity
[Articolo su rivista]
Giuliana, Villa; Fioroni, Chiara; Davide, Persico; Andrew P., Roberts; Fabio, Florindo
abstract
[1] During the Eocene-Oligocene transition, Earth cooled significantly from a greenhouse to an icehouse climate. Nannofossil assemblages from Southern Ocean sites enable evaluation of paleoceanographic changes and, hence, of the oceanic response to Antarctic ice sheet evolution during the Eocene and Oligocene. A combination of environmental factors such as sea surface temperature and nutrient availability are recorded by the assemblages of calcifying organisms, and can be interpreted as responses to the following changes. A cooling trend, which started in the Middle Eocene, was interrupted by transient warming during the Middle Eocene Climatic optimum and by several short cooling episodes. The cooling episode at 39.6 Ma preceded a shift toward an interval that was dominated by oligotrophic nannofossil assemblages from ~39.1 to ~36.2 Ma. We suggest that these oligotrophic conditions were associated with increased water mass stratification, low nutrient contents, and high efficiency of the oceanic biological pump that, in turn, promoted sequestration of carbon from surface waters, which favored cooling. After 36.2 Ma, we document a large synchronous surface water productivity turnover with a dominant eutrophic nannofossil assemblage that was accompanied by a pronounced increase in magnetotactic bacterial abundance. This turnover likely reflects a response of coccolithophorids to changed nutrient inputs that was likely related to partial deglaciation of a transient Antarctic ice sheet and/or to iron delivery to the sea surface. Eutrophic conditions were maintained throughout the Oligocene, which was characterized by a nannofossil assemblage shift toward cool conditions at the Eocene–Oligocene transition. Finally, a warm nannofossil assemblage in the Late Oligocene indicates a warming phase.
2014
- Middle Eocene-Lower Oligocene biostratigraphy and
paleoceanography of the Western Equatorial Indian Ocean based on Calcareous Nannofossils, ODP Site 711
[Articolo su rivista]
Fioroni, Chiara; Villa, G.; Persico, D.
abstract
Nannofossil biostratigraphy and paleoceanography Equatorial Indian Ocean
2014
- The evolution of the Miocene platform-basin system in the northern Apennines: what can we learn from seep-carbonates?
[Abstract in Rivista]
Grillenzoni, G.; Conti, Stefano; Fioroni, Chiara; Fontana, Daniela; Salocchi, A.
abstract
Cold seep-carbonates documenting the expulsion of fluids enriched in methane have been identified in a variety of
basin margins and tectonic-sedimentary settings. A number of geological factors influences methane seep activity, but
primarily regional and local tectonics, mainly at the deformation front of accretionary prism and inner foredeep.
Tectonics constrains the fluid circulation system, with faults and fractures serving as conduits and channelling water
and methane up to the seafloor. Recent studies suggest that seep-carbonates occurrence is also controlled by climatic
changes and their formation seems to correlate with cold periods and sea level low-stand. A drop of the hydraulic
pressure on the plumbing system during sea level lowering in glacial phase could increase methane flows at seeps,
inducing carbonate precipitation. The correlation between methane-derived carbonates and climate has been recently
suggested for the Miocene of the northern Apennines by means of a sedimentological and biostratigraphic study of
seep-carbonates and the enclosing hemipelagic marls (Vicchio Formation) (Fontana et al., 2013). The study suggests a
correlation between the carbonate precipitation and the middle Miocene glacial cooling event (Mi3b). The triggering of
the ascent and emission of methane-rich fluids may be related to the eustatic fall and in turn to the water pressure
drop. A detailed stratigraphic and biostratigraphic study of seep-carbonates and enclosing marls in foredeep deposits of
the Tuscan-Romagna Apennines has allowed a precise dating of seepage in slope and basinal successions. The analysis
of the δ18O and δ13C records of carbonates, δ13Corg excursion of organic matter and TOC on the marls enclosing the
authigenic carbonates has been performed in order to verify a correlative trend in correspondence of the climatic
cooling event. A paleoecological study on benthic foraminifera assemblages has also allowed to detail these peculiar
environments. The events defined from this study in basinal deposits have been correlated with depositional changes
and discontinuity surfaces in the adjacent temperate-type carbonate platforms, and have contributed to the definition of
modes and rates of the demise of carbonate deposition. The identification of cold phases and lowering of sea level in
slope-basinal deposits and their detailed timing, may be a useful tool for correlation between deep depositional setting
and coeval shallow-water successions. This approach may also provide important constrains in the reconstruction of the
evolution of the Miocene platform-basin system in this complex compressive setting of the northern Apennines.
Fontana D., Conti S., Grillenzoni C., Mecozzi S., Petrucci F. & Turco E. 2013. Evidence of climatic control on
hydrocarbon seepage in the Miocene of the northern Apennines:
2013
- Large reactivated earth flows in the northern Apennines (Italy): An overview
[Relazione in Atti di Convegno]
Bertolini, G.; Fioroni, C.
abstract
This paper proposes an overview on ancient earth flows and their reactivation mechanisms. All considerations made herein are the result of direct experience and observation of actual events which have occurred in the Northern Apennines from 1994 to 2006, when many large earth flows reactivated, 17 of which have been studied and monitored by the part of technical surveys of the Emilia-Romagna regional authority. Particular attention has been paid to the analysis of the evolution of landslides, acknowledging a typical, recurring succession of events that precede the failure of the slope. In general, the observation of past events has proved to be an useful mean for understanding which are the conditions and behaviours that usually lead to the reactivation of an ancient landslide body. © Springer-Verlag Berlin Heidelberg 2013.
2013
- Le Brecce argillose di Musigliano (Appennino Vogherese – Tortonese): dati stratigrafici preliminari
[Articolo su rivista]
Panini, Filippo; Fioroni, Chiara; Fregni, Paola
abstract
An integrated biostratigraphic study based on foraminifers and calcareous nannofossils has been performed on two chaotic bodies involved within the Epiligurian pelitic sequence outcropping in the Alessandria and Pavia Apennines (M. Penola & M. Vallassa area), allowing to define the age of their emplacement. The investigated deposits mainly consist of strongly tectonized sediments ensuing from the Ligurian substratum mainly through submarine cohesive mud flows and lithic debris. These chaotic bodies have been previously considered (Gelati et al., 1974; Gelati & Vercesi, 1994) as involved within the Antognola Formation and correlated with similar Lower Miocene deposits widespread in Northern Apennines (Canossa Olistostrome, Val Tiepido-Canossa argillaceous Breccias). Dissenting from previous interpretations, our study shows that these chaotic bodies, named here as “Musigliano argillaceous Breccias” were displaced in an interval between Late Eocene and Early Oligocene. In fact, the biostratigraphic analyses of the marlstones under the chaotic bodies indicate they are attributable to the P15 and P16 planktonic foraminifer biozones of Berggren et al., (1995) corresponding to the G. semiinvoluta and T. cerroazulensis biozones of Mancin et al. (2003). The same pelitic rocks are relatable to the MNP19/20 nannofossil biozone of Catanzariti et al. (1997), corresponding to the NP19/20 of Martini (1971). The Epiligurian marlstones and turbiditic mudstones upon the Musigliano argillaceous Breccias fall in the P19 p.p. / P20 (corresponding to the G. ampliapertura biozone, Mancin et al., 2003) corresponding to the MNP23 biozone (Catanzariti et al., 1997) and to the NP23 biozone of Martini(1971). We correlate the pelitic rocks under the Musigliano argillaceous Breccias to the uppermost part of the Monte Piano Marls (“grey lithofacies” according to Mancin & Cobianchi, 2000 and Panini et al., 2002), and the marlstones and turbiditic mudstones upon the sedimentary chaotic bodies to the Ranzano Formation, on the basis of lithologic features and age. The displacement of the Musigliano chaotic breccias marks a strong stratigraphic break in the Epiligurian sequence; it could be related to events (probably of tectonic nature) previously reported as affecting the lower part of the Epiligurian succession and the coeval sequence of the Tertiary Piedmont Basin (Mutti et al., 1995; Catanzariti et al.,1997; Martelli et al., 1998; Ottria et al., 2001). As in the Emilia south-easternmost Apennines, the Oligocene-Lower Miocene Epiligurian sedimentary record seems to be devoid of typical resedimented arenaceous bodies generally characterizing the Ranzano Formation also in the studied area.
2013
- Middle Eocene-Lower Oligocene nannofossil biostratigraphy and paleoceanography from ODP Site 711 (Equatorial Indian Ocean)
[Abstract in Rivista]
Fioroni, Chiara; Villa, G.; Persico, D.; Jovane, L.
abstract
Equatorial biostratigraphy
2013
- Seep-carbonate case studies as highlights in the evolution of the Miocene of northern Apennines
[Relazione in Atti di Convegno]
Grillenzoni, Claudia; Conti, Stefano; Fontana, Daniela; Fioroni, Chiara
abstract
Different case studies of seep-carbonate outcrops in the Northern Apennines show that an accurate timing of precipitation, and the identification of processes of ascent of methane-rich fluids, are important points for understanding and estimating the complex interplay of tectonics and climate changes during the Miocene of the northern Apennines.
2012
- A refined calcareous nannofossil biostratigraphy for the middle Eocene – early Oligocene Southern Ocean ODP sites
[Articolo su rivista]
Persico, D.; Fioroni, Chiara; Villa, G.
abstract
This work presents the stratigraphic distribution of several species of calcareous nannofossil in themiddle Eocene early - Oligocene from four Ocean Drilling Program (ODP) sites located between60° and 65°S paleolatitude in the Southern Atlantic and Indian Oceans. Useful nannofossil datumsthat should facilitate construction of age-models and contribute to an integrated chronology for theupper Paleogene Southern Ocean sediments from ~ 42 to 33 Ma are summarized. The distributionpatterns of calcareous nannofossils, studied by means of quantitative and semiquantitative methods,provide an improvement of the classical Southern Ocean biozonations, introducing newbiostratigraphically useful biohorizons, and testing their reproducibility within and outside theregion.
2012
- Aerial inventory of surficial geological effects induced by the recent Emilia earthquake (Italy): preliminary report.
[Articolo su rivista]
G., Bertolini; Fioroni, Chiara
abstract
As a consequence of the two main shocks that recently
struck the central alluvial Po Plain (May 20, 2012, ML 5.9, and
May 29, 2012, ML 5.8), a great number of surficial geologic
disturbances appeared over a wide area (ca. 500 km2), which
extended up to 20 km from the epicenters. The affected area
includes Mirabello, San Carlo, Sant'Agostino (Province of
Ferrara), San Felice, Cavezzo, Concordia (Modena), Moglia
and Quistello (Mantova).
Most of the surficial effects that were observed during
this study were clearly induced (directly or indirectly) by sand
liquefaction phenomena, such as sand volcanoes, burst of
water and sand from domestic wells, tension cracks, lateral
spreading and associated deformation, graben-like fracturing,
and sink-holes. Other effects can probably be ascribed
simply to the shaking of the ground (e.g., small collapses of
irrigation canal walls). Lastly, there were also some features
of dubious origin, such as two 'yellow crop spots' that are
cited here with reservations.
All of these data were surveyed by means of a small airplane
that was especially adapted for this purpose.
The aim of this study was to furnish a wide-ranging
image of the surface deformation over the whole area impacted
by these recent earthquakes, as an instrument towards
more exhaustive research, both at the scientific and
technical levels (e.g., seismic microzonation).
2012
- Erratum to "Revised middle Eocene-upper Oligocene calcareous nannofossil biozonation for the Southern Ocean" [Revue de Micropaléontologie 2012;55(2):53-70]
[Articolo su rivista]
Fioroni, C.; Villa, G.; Persico, D.; Wise, S. W.; Pea, L.
abstract
2012
- Revised middle Eocene - upper Oligocene calcareous nannofossil biozonation for the Southern Ocean
[Articolo su rivista]
Fioroni, Chiara; Villa, G.; Persico, D.; Wise, S. W.; Pea, L.
abstract
Calcareous Nannofossils are widely utilized in biostratigraphic studies of Cenozoic sediments.In recent years large datasets have been acquired, and several bioevents showed to be unreliable whencorrelated over distant areas. New biostratigraphic investigations of middle Eocene-upper Oligocenedeep-sea cores have highlighted problem areas in the currently used calcareous nannofossil zonalschemes for the Southern Ocean for this time interval. Quantitative analysis on sediments from sevensites from this area, characterized by abundant, diverse, and moderately to well-preserved nannofloralassemblages, have enabled a revision of the existing zonation for the Southern Ocean, and thedevelopment of a high-resolution zonal scheme for the middle Eocene-upper Oligocene. Eleven zonesand six subzones are introduced or emended to replace the ten zones and two subzones of the Wei andWise (1990a) and Wei and Thierstein (1991) zonations, with the identification of several newbiohorizons. New age calibrations are provided improving regional correlations and evaluating thereliability of the identified events for supraregional correlations. Comparisons are made between theproposed zonation and the existing schemes, both on nannofossils from different geographic areas, andon foraminifers from southern high latitude.
2012
- Revisiting the Geology of the "Sillaro Line", Northern Apennines, Italy
[Articolo su rivista]
Bettelli, Giuseppe; Panini, Filippo; Fioroni, Chiara; Nirta, G.; Remitti, Francesca; Vannucchi, P.; Carlini, M.
abstract
-
2011
- Revised middle Eocene - upper Oligocene calcareous nannofossil biozonation for the Southern Ocean
[Abstract in Rivista]
Fioroni, Chiara; G., Villa; D., Persico; S. W., Wise; L., Pea
abstract
Revision of the existing biostratigraphic schemes for the Southern Ocean
2010
- Middle Eocene – Late Oligocene paleoceanographic changes inferred by calcareous nannofossils from Kerguelen Plateau and Maud Rise (Antarctica)
[Abstract in Rivista]
G., Villa; Fioroni, Chiara; D., Persico
abstract
-
2010
- Progetto integrato sull'evoluzione come concetto unificante delle Scienze Naturali: tematiche diverse ma interagenti.
[Relazione in Atti di Convegno]
Fioroni, Chiara; Fregni, Paola; Guidetti, Roberto; Pederzoli, Aurora; Pini, Lorenza; Veronesi, Paola
abstract
-Numerosi sono gli argomenti che si possono prestare all’integrazione fra discipline scientifiche e in special modoquelle afferenti alle scienze della natura che risultano imprescindibili l’una dall’altra.Poiché l’evoluzione fornisce importanti nozioni e spiega i meccanismi fondamentali per la comprensione delmondo naturale, i curricula didattici e gli insegnanti dovrebbero enfatizzare la sua importanza come concettounificante delle Scienze Naturali per la poliedricità di argomenti coinvolti.Vista la rilevanza della tematica si è sentita la necessità di elaborare una proposta didattica che costituisse unapossibile risposta al problema presentato.
2010
- Revised Eocene-Oligocene calcareous nannofossil biozonation for the Southern Ocean
[Abstract in Rivista]
Fioroni, Chiara; G., Villa; D., Persico; S. W., Wise; L., Pea
abstract
-
2009
- Il paesaggio geologico dei gessi triassici
[Articolo su rivista]
Bertolini, G.; Fioroni, Chiara
abstract
This paper presents a virtual excursion “inside” the landscape of the Triassic Gypsum Formation and the upperSecchia Valley. It proposes an aerial view that, through different viewpoints, allows the observer to recogniseelements of the landscape that are difficult to see from the ground, such as the long faults shapingthe steep slopes and the largest landslides of the Emilia-Romagna Apennines. The broad bed of the Secchiariver flows in a straight course for 5.5 kilometres between towering rock-faces of white, pink and lightgray gypsum, rising up 200 metres in some point. Triassic Gypsum contains a number of different lithologies:gypsum, anhydrites, dolomite and quartzite, which form a distorted rock structure with fragments of layersthat present ruptures and folding. They were deposited during the Upper Triassic (215-200 million years ago)and therefore are the oldest rock outcrops in the Emilia-Romagna Apennines. The linear shape of the mainversants is interrupted by lateral valleys drawn by the tectonics, such as the Sologno and The Dorgola valleys.These numerous morphological features make this landscape unique within the Apennines. The steepgradients, coupled with instability brought about by karstic phenomena, make this a suggestive but highlyinhospitable area.
2009
- L'evoluzione come concetto unificante delle Scienze Naturali
[Abstract in Atti di Convegno]
Fioroni, Chiara; Fregni, Paola; Guidetti, Roberto; Pederzoli, Aurora; Pini, L.; Veronesi, P.
abstract
-
2008
- Evidenze geologiche di variazioni climatiche oloceniche.
[Articolo su rivista]
Bertolini, G.; Fioroni, Chiara
abstract
-
2008
- High resolution Late Eocene - Late Oligocene biostratigraphy from Site 1090 (Agulhas Ridge, South Atlantic)
[Abstract in Rivista]
Fioroni, Chiara; Persico, D.; Pea, L.; Palandri, S.; Villa, G.
abstract
-
2008
- Late Eocene - late Oligocene nannofossil paleoecology at Site 1090 (Agulhas Ridge, South Atlantic)
[Abstract in Rivista]
Pea, L.; Fioroni, Chiara; Persico, D.; Palandri, S.; Villa, G.
abstract
-
2008
- Middle Eocene-late Oligocene climate variability: Calcareous nannofossil response at Kerguelen Plateau, Site 748
[Articolo su rivista]
Villa, G.; Fioroni, Chiara; Pea, L.; Bohaty, S.; Persico, D.
abstract
A major deterioration in global climate occurred through the Eocene–Oligocene time interval,characterized by long-term cooling in both terrestrial and marine environments. During thislong-term cooling trend, however, recent studies have documented several short-livedwarmingand cooling phases. In order to further investigate high-latitude climate during these events, wedeveloped a high-resolution calcareous nannofossil record from ODP Site 748 Hole B for theinterval spanning the late middle Eocene to the late Oligocene (~42 to 26 Ma). The primarygoals of this study were to construct a detailed biostratigraphic record and to use nannofossilassemblage variations to interpret short-term changes in surface-water temperature andnutrient conditions. The principal nannofossil assemblage variations are identified using atemperate-warm-water taxa index (Twwt), from which three warming and five cooling eventsare identified within the middle Eocene to the earliest Oligocene interval. Among these climatictrends, the cooling event at ~39 Ma (Cooling Event B) is recorded here for the first time.Variations in fine-fraction δ18O values at Site 748 are associated with changes in the Twwt index,supporting the idea that significant short-term variability in surface-water conditions occurredin the Kerguelen Plateau area during the middle and late Eocene. Furthermore, ODP Site 748calcareous nannofossil paleoecology confirms the utility of these microfossils forbiostratigraphic, paleoclimatic, and paleoceanographic reconstructions at Southern Oceansites during the Paleogene.
2008
- Percorsi divulgativi per una nuova didattica delle Scienze della Terra
[Articolo su rivista]
Fioroni, Chiara; Fregni, Paola
abstract
-
2007
- Climatic variations in Eocene - Oligocene nannofossil assemblages (Kerguelen Plateau)
[Relazione in Atti di Convegno]
Villa, G.; Fioroni, Chiara; Pea, L.; Bohaty, S.; Persico, D.
abstract
-
2007
- Il fiume: un percorso didattico per la divulgazione delle scienze della natura.
[Abstract in Atti di Convegno]
Fioroni, Chiara; Fregni, Paola
abstract
-
2007
- La città: un laboratorio didattico per la divulgazione delle Scienze.
[Relazione in Atti di Convegno]
Fregni, Paola; Fioroni, Chiara
abstract
-
2007
- Modena: an open air workshop for teaching Earth Sciences and for integration with other subjecs.
[Abstract in Rivista]
Fregni, Paola; Fioroni, Chiara
abstract
-
2006
- Carta Geologica d’Italia a scala 1:50.000. Foglio N. 219 “Sassuolo”.
[Cartografia]
Gasperi, Gianfranco; P. R. E. T. I., D; Bettelli, Giuseppe; Panini, Filippo; Fioroni, Chiara; Fregni, Paola; S. C., Vaiani
abstract
(Ed. 2005)
2006
- Geologia dell'area di Varzi (Appennino vogherese): note preliminari.
[Articolo su rivista]
Panini, Filippo; Fioroni, Chiara; Fregni, Paola
abstract
The geological survey of the Ligurids and the overlying epi-Ligurian Sequence outcropping in the Varzi zone (Oltrepo Pavese, Voghera Apennines) has brought to the acquisition of new stratigraphic and structural data in an area whose geological cartography goes back to about thirty years. The studied area is set behind an important tectonic line (Villavernia-Varzi Line) dividing the northern Apennines from the deposits of the Tertiary Piedmont Basin. The outcropping Ligurids are referable to the Cassio tectonic unit and belonging both to the Cretaceous “basal complexes” or pre-Flysch formations, and to the stratigraphically overlying upper Cretaceous-Paleogene turbiditic succession (Cassio-Viano or Val Tresinaro Sequence). Particularly, some outcrops, in the past included inside the “Chaotic pluriformational Complex” or attributed to the Pagliaro Shales, are correlable to the Viano Shales overlying the Mt. Cassio Flysch with a conformable and transitional boundary in the Emilia Apennines.The stratigraphic features of the epi-Ligurian Sequence show very close analogies with those present in many areas of the Emilia Apennines. The lower Eocene-Oligocene and lowermost Miocene part of the succession shows, besides the Monte Piano Marls, the Ranzano Fm. and the Antognola Fm., also a thick body of matrix-supported argillaceous polygenic breccias derived from mud and debris flows of Ligurian mainly shaly rocks. This body is correlable to the similar deposits that in the Emilia Apennines have been joined under the name of Baiso argillaceous Breccias, middle-late Eocene in age, approximately corresponding to the sedimentation span of time of the Monte Piano Marls. The uppermost part of the epi-Ligurian Sequence (Miocene in age) is represented by the Contignaco and Pantano Formations widely outcropping also in the Emilia Apennines and made of relatively fine-grained clastic deposits respectively with a siliceous and carbonatic dominant feature. Finally, both on Contignaco and Pantano Fms. prevailing clastic shelf deposits awarded to the Mt. Vallassa Sandstones outcrop. Their badly defined age (middle?-upper? Miocene) and their stratigraphic position suggest a questionable correlation either with the upper Miocene Termina Formation or with the middle Miocene inner shelf deposits belonging to the Bismantova Group of the Emilia Apennines.On the basis of their attitude, a strong structural difference between the lower (pre-Miocene) and the upper part of the epi-Ligurian Sequence is clear. The first one is partly involved in an overturned synclinal and it generally shows tectonic contacts among the formations and meaningful stratigraphical differences among neighboring zones. The second shows, on the whole, a more simple attitude (monoclinalic), usually plunging to N-NW and preserved stratigraphic boundaries. This suggests that also this sector of the Voghera Apennines has been interested, as in other areas of the Oltrepo Pavese and of the Emilia Apennines, by Oligocene and/or late Oligocene-early Miocene deforming phase. This late Oligocene-early Miocene tectonic phase has been connected to the widespread deposition of thick chaotic deposits of Ligurian materials (Val Tiepido-Canossa argillaceous Breccias) within the epi-Ligurian basin. A second meaningful Miocene (late Serravallian - early Tortonian?) deforming phase (mainly characterized by the development of a moderate brittle tectonics) is documented by the stratigraphic discontinuity at the base of the Mt. Vallassa Sandstones.
2006
- L’alluvione tardo medievale di Rubiera (RE). Abstract Convegno Nazionale Geosed, Modena, settembre 2006.
[Abstract in Atti di Convegno]
Fioroni, Chiara; Bertolini, G.
abstract
-
2006
- Note illustrative della Carta Geologica d'Italia alla scala 1: 50.000. Foglio 219 "Sassuolo". APAT, Regione Emilia Romagna
[Monografia/Trattato scientifico]
Gasperi, Gianfranco; Preti, G; Bettelli, Giuseppe; Panini, Filippo; Pizziolo, M; Bonazzi, Ugo; Fioroni, Chiara; Fregni, Paola; Vaiani, S. C.
abstract
-
2006
- Response to Eocene-Oligocene nannofossils to southern ocean temperature variation.
[Abstract in Rivista]
Persico, D.; Villa, G.; Fioroni, Chiara; Pea, L.
abstract
-
2005
- Carta Geologica dell’Appennino emiliano-romagnolo alla scala 1:10.000. Foglio n. 219010 “Scandiano”. Regione Emilia Romagna, S.EL.CA. Firenze.
[Cartografia]
Bonazzi, Ugo; Fioroni, Chiara; Fregni, Paola; Pizziolo, M; Preti, D.
abstract
-
2005
- Carta Geologica dell’Appennino emiliano-romagnolo alla scala 1:10.000. Foglio n. 219060 “Sassuolo”. Regione Emilia Romagna, S.EL.CA. Firenze.
[Cartografia]
Bonazzi, Ugo; Fioroni, Chiara; Fregni, Paola; Gasperi, Gianfranco; Pizziolo, M; Preti, D.
abstract
-
2005
- Carta Geologica dell’Appennino emiliano-romagnolo alla scala 1:10.000. Foglio n.219150 “Castellarano”. Regione Emilia Romagna, S.EL.CA. Firenze.
[Cartografia]
Bonazzi, Ugo; Fioroni, Chiara; Fregni, Paola
abstract
-
2005
- Carta geologica dell'Appennino emiliano-romagnolo a scala 1:10.000 - Sezione 219150 "S. Dalmazio" (Edizione 2003)
[Cartografia]
Panini, Filippo; Fioroni, Chiara; Fregni, P.; Pizziolo, M.
abstract
-
2005
- Carta geologica dell'Appennino emiliano-romagnolo a scala 1:10.000 - Sezione 219160 "Guiglia" (Edizione 2003)
[Cartografia]
Panini, Filippo; Bonazzi, Ugo; Fioroni, Chiara; Fregni, Paola
abstract
-
2005
- Carta geologica e Note illustrative della Carta Geologica d’Italia a scala 1:50.000. Foglio N. 219 “Sassuolo”
[Monografia/Trattato scientifico]
Gasperi, Gianfranco; Bettelli, Giuseppe; Panini, Filippo; Bonazzi, Ugo; Fioroni, Chiara; Fregni, Paola; S. C., Vaiani
abstract
Vedi introduzione nel file Note illustrative
2005
- Middle Eocene climatic optimum as recognized by calcareous nannofossils at Kerguelen Plateau, Site 748. Convegno Fist, 21-23 settembre 2005 (poster) Epitome, 01.0079, geoitalia2005.
[Abstract in Rivista]
Villa, G.; Fioroni, Chiara; Persico, D.
abstract
-
2004
- A multidisciplinary study of middle Miocene seep-carbonates from the northern Apennine foredeep (Italy)
[Articolo su rivista]
Conti, Stefano; Fontana, Daniela; A., Gubertini; Sighinolfi, Giampaolo; F., Tateo; Fioroni, Chiara; Fregni, Paola
abstract
Several pelitic intervals are intercalated at various levels within the marly-arenaceous turbiditic successions of the middle Miocene northern Apennine foredeep. They range in thickness from 30 to 200 m, and represent sedimentation on top of ephemeral structural highs related to blind faults. Sediments are made up of hemipelagites and fine-grained turbidites, and include C-13-depleted carbonates, related to the rising of methane-rich fluids (hydrocarbon seep-carbonates). Large portions of pelitic intervals are involved in chaotic masses by soft sediment deformation (slumps, slides, intraformational breccias), revealing an intense sediment instability during middle Miocene. A stratigraphic, mineralogic and geochemical study was conducted on two of these pelitic intervals (Castagno d´Andrea, Mt Citerna) in order to reconstruct carbonate development, the composition of fluids, and to document the connections between fluid seepage and syndepositional tectonics. This multidisciplinary approach has allowed us to discriminate between the two examined pelitic intervals in terms of age, depositional rates and conditions, organic carbon and post-depositional processes. Seep-carbonates are characterized by chemosymbiotic fossil communities, autoclastic fractures and brecciation; carbonate bodies show complex facies relationships, as indicative of different stages in chemoherm growth. The compositional study evidences the peculiar chemistry of chemoherm carbonates (calcite low in Mg and Sr) compared with carbonates in associated enclosing pelites and with modern chemoherms, in general. The non-carbonate components within the chemoherms are enriched in detrital minerals and depleted in phyllosilicates with respect to the enclosing pelites. The mineralogical changes in the clay component within the brecciated unit of the Castagno d´Andrea chemoherms suggest authigenic precipitation of the Mg-rich phases. Isotopic analyses show the distinct carbon signature in the chemoherms from the two examined intervals (Castagno d´Andrea chemoherms more depleted, from - 15.8parts per thousand up to - 41.3parts per thousand PDB, than Mt Citema, from - 5.2parts per thousand up to - 16.7parts per thousand), and the transitional C-13-depletion trend observed moving from chemoherms to the enclosing pelites (moderately depleted) and Te (Bouma sequence) turbidites (in the range of marine carbonates). A slight but significant enrichment in delta(18)O (up to +1.4% PDB);is observed for all chemoherms when compared to values of carbonate phases present in enclosing pelites. Geochemical data indicate that the brecciated facies of seep-carbonates are related to an explosive release of gaseous fluids probably associated with the rise of deep hypersaline fluids.
2004
- Criteri e metodi di rilevamento delle rocce caotiche in aree campione: l'area tra Abbadia S. Salvatore e Piancastagnaio (Toscana meridionale). Carta Geologica alla scala 1:10000.
[Cartografia]
Bettelli, Giuseppe; Conti, Stefano; Fioroni, Chiara; Fregni, P; Gibellini, R; Panini, Filippo; Vannucchi, P.
abstract
Risorsa Elettronica
2004
- Criteri e metodi di rilevamento delle rocce caotiche in aree campione: l'area tra i Fiumi Sinello e Osento (Molise). Carta Geologica alla scala 1:10000.
[Cartografia]
Bettelli, Giuseppe; Conti, Stefano; Fioroni, Chiara; Fregni, P; Mondani, C; Panini, Filippo; Vannucchi, P.
abstract
Risorsa Elettronica
2003
- Carta Geologica Regionale alla scala 1:25.000 della Regione Emilia-Romagna, "Monghidoro"- 237 SE. Foglio 237 "Sasso Marconi".
[Cartografia]
Panini, Filippo; Bettelli, Giuseppe; Pizziolo, M. con contributi di AMOROSI A.; Basoli, R.; Bonazziu, ; Borsetti, A. M.; Capitani, M.; Fioroni, Chiara; Fregni, Paola; Fontana, Daniela; MANTOVANI UGUZZONI, Maria Pia
abstract
-
2003
- Carta Geologica Regionale alla scala 1:25.000 della Regione Emilia-Romagna, "Sasso Marconi- 237 NE. Foglio 237 "Sasso Marconi".
[Cartografia]
Panini, Filippo; Bettelli, Giuseppe; Pizziolo, M. con contributi di AMOROSI A.; Basoli, R.; Bonazzi, Ugo; Borsetti, A. M.; Capitani, M.; Fioroni, Chiara; Fregni, Paola; Fontana, Daniela; MANTOVANI UGUZZONI, Maria Pia
abstract
-
2003
- Carta Geologica Regionale alla scala 1:25.000 della Regione Emilia-Romagna, "Savigno- 237 NO. Foglio 237 "Sasso Marconi"
[Cartografia]
Panini, Filippo; Bettelli, Giuseppe; Pizziolo, M. con contributi di AMOROSI A.; Basoli, R.; Bonazzi, Ugo; Borsetti, A. M.; Capitani, M.; Fioroni, Chiara; Fregni, Paola; Fontana, Daniela; MANTOVANI UGUZZONI, Maria Pia
abstract
-
2003
- Carta Geologica Regionale alla scala 1:25.000 della Regione Emilia-Romagna, "Vergato"- 237 SO. Foglio 237 "Sasso Marconi". S.EL.CA Firenze
[Cartografia]
Panini, Filippo; Bettelli, Giuseppe; Pizziolo, M.; CON CONTRIBUTI, Di; Amorosi, A.; Basoli, R.; Bonazzi, Ugo; Borsetti, A. M.; Capitani, M.; Fioroni, Chiara; Fregni, Paola; Fontana, Daniela; MANTOVANI UGUZZONI, Maria Pia
abstract
-
2003
- Carta Geologica alla scala 1:50.000 dell'area compresa tra Borgo Priolo e Ruino.
[Cartografia]
Bettelli, Giuseppe; Conti, Stefano; Fioroni, Chiara; Fregni, Paola; Mondani, C.; Panini, Filippo; Vannucchi, P.
abstract
-
2003
- Criteri e metodi di rilevamento delle rocce caotiche in aree campione: l’area tra i fiumi Sinello e Osento
[Cartografia]
Bettelli, Giuseppe; Conti, Stefano; Fioroni, Chiara; Fregni, Paola; C., Mondani; Panini, Filippo; P., Vannucchi
abstract
rilevamento geologico di arre campione, utili alla definizione di rocce caotiche
2003
- I depositi tardo-messiniani di Savignano sul Panaro (Appennino modenese)
[Articolo su rivista]
Fregni, Paola; Panini, Filippo; Corradini, Domenico; Fioroni, Chiara; Lugli, Stefano; M., Ansaloni
abstract
-
2002
- Carta Geologica d’Italia a scala 1:50,000. Foglio 236 “Pavullo”
[Cartografia]
Bettelli, Giuseppe; Panini, Filippo; Pizziolo M. e., con contributi di; : Amorosi, A.; Bonazzi, Ugo; Fazzini, Paolo; Fioroni, Chiara; Fregni, Paola; MANTOVANI UGUZZONI, Maria Pia
abstract
carta geologica progetto CARG
2002
- Carta Geologica d’Italia a scala 1:50.000. Foglio N. 237 “Sasso Marconi”.
[Cartografia]
Panini, Filippo; Bettelli, Giuseppe; M. PIZZIOLO e. con contributi di A., Amorosi; R., Basoli; U., Bonazzi; Am, Borsetti; M., Capitani; Fioroni, Chiara; Fontana, Daniela; P., Fregni; M. P., MANTOVANI UGUZZONI
abstract
S.EL.CA., Firenze, Italy
2002
- Le rocce caotiche dell’Oltrepo pavese: note illustrative della carta geologica dell’Appennino vogherese tra Borgo Priolo e Ruino
[Articolo su rivista]
Panini, Filippo; Fioroni, Chiara; Fregni, Paola; Bonacci, M.
abstract
-
2002
- Note illustrative alla Carta Geologica d’Italia a scala 1:50.000. Foglio N. 236 “Pavullo”
[Cartografia]
Bettelli, Giuseppe; Panini, Filippo; M., Pizziolo; U., Bonazzi; M., Capitani; P., Fazzini; Fioroni, Chiara; Fregni, Paola; G., Gasperi
abstract
Note illustrative
2002
- Note illustrative alla Carta Geologica d’Italia a scala 1:50.000. Foglio N. 237 “Sasso Marconi”.
[Cartografia]
Panini, Filippo; Bettelli, Giuseppe; Pizziolo, M; Bonazzi, Ugo; Capitani, M; Gasperi, Gianfranco; Fioroni, Chiara; Fregni, Paola
abstract
Note illustrative
2002
- Note illustrative della Carta Geologica d’Italia alla scala 1:50.000. Foglio 252 – "Barberino del Mugello"
[Cartografia]
Bettelli, Giuseppe; M., Boccaletti; U., Cibin; Panini, Filippo; C., Poccianti; S., Rosselli; F., Sani; R., Catanzariti; Fioroni, Chiara; E., Fornaciari; Fregni, Paola; A., Di Giulio; M., Benvenuti; P., Gasperini; L., Martelli
abstract
note illustrative
2001
- Carta Geologica Regionale alla scala 1:25.000 della Regione Emilia-Romagna"Fanano"- 236 SO. Foglio 236 "Pavullo nel Frignano".
[Cartografia]
Bettelli, Giuseppe; Panini, Filippo; Pizziolo, M. con contributi di AMOROSI A.; Bonazzi, Ugo; Fazzini, Paolo; Fioroni, Chiara; Fregni, Paola; MANTOVANI UGUZZONI, Maria Pia
abstract
-
2001
- Carta Geologica Regionale alla scala 1:25.000 della Regione Emilia-Romagna"Lama Mocogno"- 236 NO. Foglio 236 "Pavullo nel Frignano".
[Cartografia]
Bettelli, Giuseppe; Panini, Filippo; Pizziolo, M. con contributi di AMOROSI A.; Bonazzi, Ugo; Fazzini, Paolo; Fioroni, Chiara; Fregni, Paola; MANTOVANI UGUZZONI, Maria Pia
abstract
-
2001
- Carta Geologica Regionale alla scala 1:25.000 della Regione Emilia-Romagna, "Montese"- 236 SE. Foglio 236 "Pavullo nel Frignano".
[Cartografia]
Bettelli, Giuseppe; Panini, Filippo; Pizziolo, M.; con contributi, Di; Amorosi, A.; Bonazzi, Ugo; Fazzini, Paolo; Fioroni, Chiara; Fregni, Paola; MANTOVANI UGUZZONI, Maria Pia
abstract
-
2001
- Carta Geologica Regionale alla scala 1:25.000 della Regione Emilia-Romagna, "Pavullo nel Frignano"- 236 NE. Foglio 236 "Pavullo nel Frignano". S.EL.CA Firenze
[Cartografia]
Bettelli, Giuseppe; Panini, Filippo; Pizziolo, M.; con contributi, Di; Amorosi, A.; Bonazzi, Ugo; Fazzini, Paolo; Fioroni, Chiara; Fregni, Paola; MANTOVANI UGUZZONI, Maria Pia
abstract
-
2001
- L'unità stratigrafico-strutturale Samoggia (Liguridi esterne) dell'Appennino bolognese-modenese: dati stratigrafici e considerazioni paleogeografiche.
[Articolo su rivista]
Panini, Filippo; Fioroni, Chiara; Bettelli, Giuseppe; C., Mondani
abstract
-
2000
- Metodi e tecniche di rilevamento delle rocce caotiche appenniniche
[Relazione in Atti di Convegno]
Bettelli, Giuseppe; M., Bonacci; Conti, Stefano; Fregni, Paola; Fioroni, Chiara; R., Gibellini; C., Mondani; Panini, Filippo; P., Vannucchi
abstract
La ricerca si propone di definire i criteri di rilevamento (principi) ed i metodi pratici (tecniche) utilizzabili nella cartografia di rocce sedimentarie prive di una coerenza interna a causa dell’assenza di superfici di stratificazione lateralmente continue. Questo è stato possibile tramite l’esperienza maturata nel rilevamento di vasti settori dell’Appennino Settentrionale e attraverso lo studio di tre aree campione ubicate in differenti contesti geotettonici dell’Appennino (Toscana meridionale, Appennino vogherese e Abruzzo meridionale). Nello studio delle rocce caotiche deve essere tenuto distinto il problema che riguarda la genesi della loro struttura/tessitura da quello che riguarda la loro attuale giacitura. Devono essere individuati, pertanto, dei criteri utili a riconoscere in modo oggettivo i meccanismi responsabili della struttura/tessitura caotica, e dei criteri che permettano di ricavare le modalità con le quali la stessa roccia ha acquisito la sua attuale giacitura.Alla scala dell’affioramento i caratteri oggettivi che permettono di attribuire la genesi di una roccia caotica a meccanismi sedimentari o tettonici sono: l’associazione litologica, la tessitura e la struttura mesoscopica.Gli elementi diagnostici utili a riconoscere i meccanismi che hanno portato una roccia ad acquisire una giacitura caotica sono: l’estensione e lo spessore; la natura dei contatti; le relazioni con le rocce circostanti; il fatto che rappresenti un corpo che include altri corpi stratigraficamente incompatibili o che costituisca un corpo estraneo dal punto di vista stratigrafico; l’esistenza di stili strutturali contrastanti; la presenza di collocazioni stratigrafiche anomale; l’esistenza di caratteristiche paleoambientale incongruenti.L’insieme dei criteri e degli elementi diagnostici elencati permette di distinguere i seguenti tipi di rocce caotiche: brecce sedimentarie (depositi di debris e mud flow); tettoniti in situ o primarie; associazioni di tettoniti e brecce sedimentarie; tettoniti dislocate da meccanismi sedimentari o tettoniti secondarie.Le tecniche ed i criteri individuati hanno dimostrato una validità generale, applicabile nei vari domini geotettonici dell’Appennino, indipendentemente dall’entità delle deformazioni tettoniche. Essi rappresentano quindi uno strumento fondamentale non solo per migliorare la qualità della rappresentazione cartografica ma anche per ottenere informazioni di carattere stratigrafico e strutturale, indispensabili a descrivere la storia geologica di una regione caratterizzata dalla presenza di rocce sedimentarie stratigraficamente incoerenti.
1999
- 50 - Le discordanze e le forme calanchive nella successione neogenica - quaternaria, affiorante nella valle del Rio del Petrolio
[Capitolo/Saggio]
Conti, Stefano; Fioroni, Chiara; Gasperi, G.; Giusti, C.; Marchetti, M.
abstract
Gli affioramenti occupano la piccola valle del Rio del Petrolio
1999
- I Beni Geologici della Provincia di Modena
[Monografia/Trattato scientifico]
Bertacchini, Milena; Bettelli, Giuseppe; Bonazzi, U.; Capedri, S.; Capitani, M.; Castaldini, Doriano; Conti, Stefano; Corradini, D.; Fioroni, Chiara; Fontana, Daniela; Fregni, P.; Gasperi, G.; Giusti, C.; Lugli, Stefano; Marchetti, Mauro; Panini, Filippo; Panizza, M.; Pellegrini, M.; Piacente, S.; Rossi, A.; Soldati, Mauro; Tosatti, G.
abstract
Sono presentati, sotto forma di schede, i beni geologici (o geositi) censiti nella Provincia di Modena. Le schede sono state aggregate in cinque paragrafi: Beni geomorfologici, Fluidi sotterranei, Esposizioni di valore stratigrafico e strutture sedimentarie, Esposizioni di strutture tettoniche, Ofioliti. Si è cercato di privilegiare da un lato una guida scientifica alla geologia della Provincia e dall'altro di segnalare un alto numero di siti allo scopo di salvaguardare il più possibile l'ambiente modenese, caratterizzato, in molte sue parti, da un'intensa e continua antropizzazione.
1997
- Carta geologica dell'Appennino emiliano-romagnolo 1:10.000. Sezione N. 237070" Marzabotto”. Regione Emilia Romagna, S.EL.CA. Firenze.
[Cartografia]
Bertolini, G; Bettelli, Giuseppe; Bonazzi, Ugo; Fioroni, Chiara; Fregni, Paola; MANTOVANI UGUZZONI, Maria Pia; Panini, Filippo; Pizziolo, M.
abstract
-
1996
- La successione Monte Venere - Monghidoro nell'Appennino modenese e bolognese
[Articolo su rivista]
Fioroni, Chiara; Fontana, Daniela; Panini, Filippo; Parmeggiani, F.
abstract
-
1995
- Carta geologica dell’Appennino emiliano-romagnolo alla scala 1:10.000. Sezione N. 236160 “Bombiana”.
[Cartografia]
Cavazzuti, M.; Fioroni, Chiara; Fregni, Paola; Panini, Filippo; Pizziolo, M.
abstract
-
1994
- Carta Geologica dell'Appennino emiliano-romagnolo alla scala 1:10.000. Sezione N. 237110 "Rioveggio".
[Cartografia]
Panini, Filippo; Fioroni, Chiara; Fregni, Paola; MANTOVANI UGUZZONI, Maria Pia
abstract
-
1994
- Carta Geologica dell'Appennino emiliano-romagnolo alla scala 1:10.000. Sezione N.237100 "Vergato".
[Cartografia]
Panini, Filippo; Fioroni, Chiara; Fregni, Paola; MANTOVANI UGUZZONI, Maria Pia; Pizziolo, M.
abstract
-
1994
- Carta geologica dell’Appennino emiliano-romagnolo alla scala 1:10.000. Sezione N. 237140 “Monteacuto Ragazza”.
[Cartografia]
Amorosi, A.; Cavazzuti, M.; Fioroni, Chiara; Fregni, Paola; MANTOVANI UGUZZONI, Maria Pia; Panini, Filippo; Pizziolo, M.
abstract
-
1994
- Carta geologica dell’Appennino emiliano-romagnolo alla scala 1:10.000. Sezione N. 237160 “Loiano”.
[Cartografia]
Cavazzuti, M.; Fioroni, Chiara; Fregni, Paola; MANTOVANI UGUZZONI, Maria Pia; Panini, Filippo
abstract
-
1993
- Carta geologica dell’Appennino emiliano-romagnolo alla scala 1:10.000. Sezione N. 237010 “Savigno”.
[Cartografia]
Bettelli, Giuseppe; Cuoghi, A.; Fioroni, Chiara; Fregni, Paola; MANTOVANI UGUZZONI, Maria Pia; Panini, Filippo; Pizziolo, M.
abstract
-
1993
- Carta geologica dell’Appennino emiliano-romagnolo alla scala 1:10.000. Sezione N. 237020 “Montepastore”.
[Cartografia]
Bettelli, Giuseppe; Cuoghi, A.; Fioroni, Chiara; Fregni, Paola; MANTOVANI UGUZZONI, Maria Pia; Panini, Filippo; Pizziolo, M.
abstract
-
1993
- Carta geologica dell’Appennino emiliano-romagnolo alla scala 1:10.000. Sezione N. 237060 “Vedegheto”.
[Cartografia]
Bertolini, G.; Bettelli, Giuseppe; Bonazzi, Ugo; Fioroni, Chiara; Fregni, Paola; MANTOVANI UGUZZONI, Maria Pia; Panini, Filippo; Pizziolo, M.
abstract
-
1992
- Carta geologica dell'Appennino emiliano-romagnolo 1:10.000. Sezione N. 235120 " Boccassuolo". Regione Emilia Romagna, S.EL.CA. Firenze
[Cartografia]
Bettelli, Giuseppe; Fioroni, Chiara; Panini, Filippo; Pizziolo, M.
abstract
-
1992
- Carta geologica dell’Appennino emiliano-romagnolo alla scala 1:10.000. Sezione N. 250040 “Fiumalbo”.
[Cartografia]
Bettelli, Giuseppe; Cibin, U.; Fioroni, Chiara; Panini, Filippo; Plesi, G.
abstract
-
1992
- Nuovi dati stratigrafici sulla successione epiligure eo-oligocenica della Val Setta (Appennino bolognese)
[Relazione in Atti di Convegno]
Bettelli, Giuseppe; Fioroni, Chiara; Fregni, Paola; Panini, Filippo
abstract
-
1991
- BETTELLI G.,BONAZZI U., CAVAZZUTI M., FIORONI C., FREGNI P., MANTOVANI UGUZZONI M.P. & PANINI F. (1991) - Carta geologica dell’Appennino emiliano-romagnolo alla scala 1:10.000. Sezione N. 236070 “Pavullo”.
[Cartografia]
Bettelli, Giuseppe; Bonazzi, Ugo; Cavazzuti, M.; Fioroni, Chiara; Fregni, Paola; MANTOVANI UGUZZONI, Maria Pia; Panini, Filippo
abstract
-
1991
- Carta geologica dell’Appennino emiliano-romagnolo alla scala 1:10.000. Sezione N. 236030 “Coscogno”.
[Cartografia]
Bettelli, Giuseppe; Bertolini, G.; Bonazzi, Ugo; Fioroni, Chiara; Fregni, Paola; MANTOVANI UGUZZONI, Maria Pia; Panini, Filippo
abstract
-
1991
- Carta geologica dell’Appennino emiliano-romagnolo alla scala 1:10.000. Sezione N. 236040 “Rocca Malatina”.
[Cartografia]
Bettelli, Giuseppe; Bertolini, G.; Bonazzi, Ugo; Fioroni, Chiara; Fregni, Paola; MANTOVANI UGUZZONI, Maria Pia; Panini, Filippo
abstract
-
1991
- Carta geologica dell’Appennino emiliano-romagnolo alla scala 1:10.000. Sezione N. 236080 “Zocca”.
[Cartografia]
Bettelli, Giuseppe; Bonazzi, Ugo; Cavazzuti, M.; Fioroni, Chiara; Fregni, Paola; MANTOVANI UGUZZONI, Maria Pia; Panini, Filippo
abstract
-
1989
- Documentazione biostratigrafica sul Miocene delle sinclinali del Pigneto e di Montebaranzone (Appennino modenese).
[Articolo su rivista]
Fioroni, Chiara; Panini, Filippo
abstract
-