13 results on '"Gliozzi, Elsa"'
Search Results
2. Paratethyan ostracods in the Spanish Lago-Mare: More evidence for interbasinal exchange at high Mediterranean sea level
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Stoica, Marius, Krijgsman, Wout, Fortuin, Anne, Gliozzi, Elsa, Paleomagnetism, Stoica, Mariu, Krijgsman, Wout, Fortuin, Anne, Gliozzi, Elsa, and Paleomagnetism
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Mediterranean climate ,010506 paleontology ,Messinian salinity crisis ,Evolution ,Structural basin ,Mediterranean ,010502 geochemistry & geophysics ,Oceanography ,01 natural sciences ,Mediterranean Basin ,Paleontology ,Mediterranean sea ,Behavior and Systematics ,Stage (stratigraphy) ,Ostracod ,Ecology, Evolution, Behavior and Systematics ,0105 earth and related environmental sciences ,Paratethys ,Earth-Surface Processes ,biology ,Ecology ,Palaeontology ,Ostracods ,biology.organism_classification ,Water level ,Taxon ,Messinian salinity crisis, Mediterranean, Paratethys, ostracods, paleogeography ,Palaeogeography ,Geology - Abstract
A gigantic cascade of Atlantic waters, filling the deep desiccated Mediterranean basin at the beginning of the Pliocene, has commonly been envisaged to end the Messinian Salinity Crisis (MSC). The Mediterranean lowstand during its final “Lago-Mare” phase, however, has long been subject to major controversy and has recently been seriously questioned again. Here, we present high-resolution ostracod distribution patterns of the MSC successions in the Black Sea basin (Zheleznyi Rog section; Russia) and the Mediterranean (Cuevas del Almanzora section; Spain) to study the origin and migration history of the Lago-Mare ostracods. We conclude that two major phases of faunal migration have taken place in the Messinian. The first phase corresponds to the Maeotian–Pontian boundary interval (~ 6.1–6.0 Ma) of the Paratethys, where mainly Pannonian species suddenly invaded the Black Sea region. The second migration event corresponds to the Lago-Mare phase of the Mediterranean when first (5.55–5.47 Ma) some opportunistic taxa (species of Cyprideis and Loxoconcha genera) and then (5.40–5.33 Ma) a more diverse assemblage of Paratethyan species occupied the entire Mediterranean region. The Spanish ostracod assemblages show a high percentage of Paratethyan (Pontian) ostracods, in agreement with previously studied Italian Lago-Mare sections. The similar palaeoenvironmental changes that developed roughly synchronously in the western and central Mediterranean marginal basins provide more evidence for intrabasinal exchange at high water level during the final stage of the Lago-Mare phase. This indicates that the Mediterranean in the latest Messinian was full of water (comparable to the present Caspian Sea) and that the Zanclean deluge, if happened, only surged some tens, up to few hundred metres, into the Mediterranean.
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- 2016
3. High-resolution palaeohydrological reconstruction of central Italy during the Holocene.
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Marchegiano, Marta, Francke, Alexander, Gliozzi, Elsa, Wagner, Bernd, and Ariztegui, Daniel
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LIMNOLOGY ,OSTRACODA ,PLEISTOCENE Epoch ,PALEOCLIMATOLOGY - Abstract
The endorheic nature of Lake Trasimeno in combination with its position in central Italy makes it a relevant site to better constrain spatial differences in Holocene climatic variability in the Mediterranean area. Herein, we present a high-resolution ostracod record from the Holocene section of an 8.59-m-long sedimentary core, which is compared with historical data to distinguish anthropogenic and climatic signals. The occurrence, abundance and vanishing of ostracod species are directly controlled by lake-level variations, which are in turn related to global and regional climatic changes (i.e. moisture variations). The total organic carbon content as well as observed lithological changes provide additional information about Lake Trasimeno's hydrological and trophic conditions in the past. Most important variations have been identified at ca. 10,000 cal. yr BP, when the lacustrine basin changed from a temporary to a permanent waterbody (from Sarsicypridopsis aculeata to Candona angulata association). The highest lake level and the total absence of ostracods occur at around 9000 cal. yr BP. The recorded humid phase persisted up to ca. 4200 cal yr BP since when a lake-level decreasing trend started and continued until the present day (Candona angulata, Cyprideis torosa and Darvinula stevensoni associations). The frequency of changes in the relative abundance of the main species shows centennial variations (i.e. C. angulata, C. torosa and Darvinula stevensoni). As historical evidences yield that human interventions to control the lake level remained unsuccessful in the past, Lake Trasimeno records an almost pristine climatic signal during most of the Holocene, which is quite unusual in the highly populated Mediterranean area. [ABSTRACT FROM AUTHOR]
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- 2019
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4. Historical evolution and Middle to Late Holocene environmental changes in Lake Shkodra (Albania): New evidences from micropaleontological analysis.
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Mazzini, Ilaria, Gliozzi, Elsa, Koci, Rexhep, Soulie-Märsche, Ingeborg, Zanchetta, Giovanni, Baneschi, Ilaria, Sadori, Laura, Giardini, Marco, Van Welden, Aurelien, and Bushati, Salvatore
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HOLOCENE Epoch , *CLIMATE change , *MICROPALEONTOLOGY , *SEDIMENTS , *BIODIVERSITY - Abstract
The 7.5 m long SK13 sediment core, drilled at Lake Shkodra (Albania) at a bottom depth of 7 m in the central southern part of the lake, was selected for multidisciplinary analysis. The sediment core age spans from 4560 cal yr BP to present. The origin and the evolution of the lake are still debated and were never investigated in detail. In historical records, until the 15th century Lake Shkodra was never mentioned as such, but as a marshland or as a confluence between two rivers. Our research aims to reconstruct the past biodiversity and the Middle-Late Holocene palaeoenvironmental and palaeoclimatic changes using Ostracods, Characeae, and comparing the micropaleontological data with pollens and stable isotope curves. Thirteen ostracod and five charophyte species were identified. Amongst the ostracods Candona montenigrina and Limnocythere scutariense are endemic of the lake; Candona meridionalis , Paralimnocythere georgevitschi , Metacypris cordata , Candona ex gr. bimucronata , and Cyclocypris sp. have been collected for the first time in Lake Shkodra; the last three taxa occurred only in the lower portion of the sediment core. Amongst the charophytes, Lychnothamnus barbatus and Nitella hyalina are recorded for the first time in the lake and occurs with high frequency throughout the lower portion of the core. A drastic change occurs between 1274 and 1197 cal yr BP, when 8 ostracod species out of 13 and all charophytes disappear, and the frequency of the remaining 5 species dramatically increases. The micropaleontological data suggest a decrease of the lake biodiversity since around 1200 cal yr BP linked to the transition between an ancient marshland to a lacustrine environment. This drastic event seems to be independent from any global or local climate change but linked to the complex hydrographic setting of the lake and of its only outlet, the River Bojana, discharging in the Adriatic Sea. [ABSTRACT FROM AUTHOR]
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- 2015
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5. The genus Cyprideis Jones, 1857 (Crustacea, Ostracoda) in the Neogene of Italy: A geometric morphometric approach.
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Ligios, Silvia and Gliozzi, Elsa
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CYPRIDIDAE ,OSTRACODA ,NEOGENE Period ,GEOMETRIC approach ,MORPHOMETRICS - Abstract
Copyright of Revue de Micropaleontologie is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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- 2012
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6. The late Messinian Lago-Mare episode in the Mediterranean Basin: Preliminary report on the occurrence of Paratethyan ostracod fauna from central Crete (Greece)
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Cosentino, Domenico, Gliozzi, Elsa, and Pipponzi, Giorgio
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OSTRACODA , *CRUSTACEA , *GYPSUM , *PLIOCENE paleoecology , *PLIOCENE stratigraphic geology , *ISLANDS - Abstract
Abstract: In the Crete Island, late Messinian Lago-Mare facies are not well known. At present, the occurrence in Crete of the uppermost Messinian post evaporitic deposits is a matter of debate. According to several authors, the well-known late Messinian Lago-Mare facies does not occur in Crete. In this paper the preliminary results obtained from the biostratigraphical analysis of some sections sampled in the Messarà Plain will be shown. Nearby Faneromeni and Ano Akria villages, the Miocene/Pliocene boundary is well exposed. There, gypsum-bearing clay, laminated microcrystalline gypsum and gypsum-rudites characterize the evaporitic deposits of the Messinian stage. In these areas, above the Messinian evaporite, post-evaporitic fine-laminated polychrome clays, with intercalations of sandstones and conglomerates, have been found. In both the Faneromeni and Ano Akria area, the Pliocene grey clays and conglomerates rest unconformably on the uppermost Messinian post-evaporitic deposits. A 20cm-spaced sampling has been performed in both the sections, for more than 100 samples collected. The results of the micropaleontological analysis performed on the Faneromeni and Ano Akria sections point to the occurrence of ostracod assemblages containing: Loxocauda limata (Schneider in Agalarova et al.), Loxocauda sp., Cytherura pyrama Schneider, Cyprideis anlavauxensis Carbonnel, Cyprideis agrigentina Decima, Amnicythere palimpsesta (Livental), Amnicythere propinqua (Livental), Amnicythere accicularia (Olteanu), Amnicythere costata (Olteanu), Amnicythere multituberculata (Livental), Amnicythere sp. D (Miculan in Bassetti et al.), Amnicythere sp. 2 Gliozzi and Grossi, Amnicythere sp., Euxinocythere (Maeotocythere) praebaquana (Livental in Agalarova et al.), Mediocytherideini indet., Pontoniella pontica (Agalarova), Camptocypria sp. 1 Gliozzi and Grossi, Caspiocypris sp., Zalanyiella venusta (Zalanyi), Tyrrhenocythere sp., Loxoconcha rhombovalis Pokorny, Loxoconcha eichwaldi Livental, Loxoconcha sp. A (Miculan in Bassetti et al.), Loxocorniculina djafarovi (Schneider in Suzin). In the analysed samples, reworked planktonic foraminifers and well-preserved charophyte gyrogonites have been also found. The ostracod assemblages found in the Messarà Plain belong to the Loxocorniculina djafarovi Zone (sensu Carbonnel, 1978), which characterizes the uppermost Messinian deposits of the whole Mediterranean Basin. At that time, the well-known Lago-Mare biofacies was also widespread on the Crete Island. The presence of Paratethyan ostracods in the post-evaporitic Messinian deposits of both Faneromeni and Ano Akria sections suggests that in the Crete Island the latest Messinian sedimentation took place in brackish water palaeoenvironments. [Copyright &y& Elsevier]
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- 2007
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7. The dawn of the Late Villafranchian: Paleoenvironment and age of the Pantalla paleontological site (Italy; Early Pleistocene).
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Cherin, Marco, Basilici, Giorgio, Duval, Mathieu, Shao, Qingfeng, Sier, Mark J., Parés, Josep M., Gliozzi, Elsa, Mazzini, Ilaria, Magri, Donatella, Di Rita, Federico, Iurino, Dawid A., Azzarà, Beatrice, Margaritelli, Giulia, and Pazzaglia, Fausto
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GEOLOGICAL time scales , *PHASE transitions , *RIVER channels , *PLEISTOCENE Epoch , *WATER levels , *ELECTRON spin resonance dating , *PALEONTOLOGY - Abstract
Biochronology is the most widely used method for organizing the successions of continental vertebrate faunas in geological time and for allowing the correlation of continental deposits. However, due to the fragmentary nature of the paleontological record and the diachronicity of first and last occurrences of vertebrate taxa in different areas (i.e., bioevents), it is difficult to precisely define the temporal boundaries between biochronological units. That is why it is crucial to calibrate biochronological data with independent proxies wherever possible. Here, thanks to an interdisciplinary approach that combines sedimentology and stratigraphy, vertebrate paleontology, micropaleontology (ostracods), palynology, and geochronology, we provide a chronological framework and a paleoenvironmental reconstruction of the paleontological site of Pantalla (Central Italy). The combination between biochronological/biostratigraphic and geochronological (U-series/ESR dating and paleomagnetism) data allows us to refer the site to c. 2.2 Ma, i.e., in the transition phase between the Middle and Late Villafranchian in the European biochronological scheme. We reconstruct the environment as a fluvial area with a frequently flooded wet floodplain and marked (probably seasonal) variations of the water level of the channel river. The depositional system was surrounded by a conifer-dominated forest, which is suggestive of a glacial phase. • Pantalla is a paleontological site yielding well-preserved terrestrial mammals. • Geological and paleontological data are combined in an interdisciplinary approach. • A chronological and paleoenvironmental framework of Pantalla is provided. • Age of the site (c. 2.2 Ma) is close to the Middle-Late Villafranchian transition. • The environment was a fluvial area with a frequently flooded wet floodplain. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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8. Ostracoda and Mollusca biodiversity and hydrochemical features in Late Miocene brackish basins of Italy
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Ligios, Silvia, Anadón, Pere, Castorina, Francesca, D’Amico, Carmine, Esu, Daniela, Gliozzi, Elsa, Gramigna, Pierparide, Mola, Marco, and Monegato, Giovanni
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OSTRACODA , *MOLLUSKS , *BIODIVERSITY , *WATER chemistry , *MIOCENE Epoch , *GEOLOGICAL basins , *ANALYTICAL geochemistry - Abstract
Abstract: Late Miocene brackish ostracods and molluscs collected in three Italian basins show noticeable differences in their taxonomic composition, despite their capability of dispersing across wide geographic areas. In the Venetian-Friulian Basin (northern Italy), the upper Tortonian sediments contain oligotypic ostracod assemblages including Hemicyprideis dacica dacica, Hemicytheria pejinovicensis, and Loxoconcha cf. L. josephi and few gastropods referable to Planorbidae and Stenothyroides, which are typical of the central Paratethys. In central Italy, the brackish ostracods and molluscs recovered from upper Tortonian-lower Messinian deposits from four Tuscan basins (Volterra-Radicondoli, Velona, Baccinello-Cinigiano, and Valdelsa) display high affinity at a generic level but strong endemicity at a specific level. At Cessaniti (southern Italy), the upper Tortonian unit contains oligotypic brackish ostracods and molluscs: Mediocytherideis (Sylvestra) posterobursa, Cyprideis ruggierii, Loxoconcha cf. L. biformata, and Zonocypris membranae quadricella characterise the ostracod fauna, while Granulolabium bicinctum and Hydrobia frauenfeldi are the dominant molluscs. The recovered ostracods have a strong affinity with brackish species from central and eastern Palaeo-Mediterranean areas, whereas the molluscs present a Paratethyan origin. Despite the fact that the basins are all brackish and partly coeval, the systematics of these assemblages highlights the absence of common species among the three studied areas. Geochemical analyses (stable isotopes and trace elements) are performed on ostracods, and 87Sr/86Sr ratios are established in molluscs and echinoids. The results suggest brackish environments with different compositions and origins of solutes in the three different areas. The Tuscan basins are characterised by brackish waters, with NaCl-enriched waters coming from aquifers of Triassic evaporite bedrock. The brackish deposits of the Venetian-Friulian Basin and Cessaniti are true marginal marine environments, although the northern basin may have been influenced by both the Paratethyan Sava Basin and the northern portion of the Palaeo-Mediterranean water bodies. [Copyright &y& Elsevier]
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- 2012
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9. Environments and tectonic instability in central Italy (Garigliano Basin) during the late Messinian Lago–Mare episode: New data from the onshore Mondragone 1 well
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Cosentino, Domenico, Federici, Ilaria, Cipollari, Paola, and Gliozzi, Elsa
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STRUCTURAL geology , *MIOCENE stratigraphic geology , *SEDIMENTARY basins - Abstract
Abstract: The Mondragone 1 well, drilled in 1968 by Agip, for hydrocarbon exploration, cut across siliciclastic fine-to-coarse-grained upper Miocene–Quaternary deposits, for a total depth of 2002 m. Thirteen cores have been recovered from 495 down to 2002 m. This paper deals with both the results of the biostratigraphical analyses performed on a new sampling of the cores and the significance of the well stratigraphy in the context of the late Messinian Lago–Mare episode in central Mediterranean. The Lago–Mare biofacies has been characterised from 675 down to 2002 m by the ostracod assemblages that are made of species belonging to the Loxocorniculina djafarovi Zone, as defined by Carbonnel [Carbonnel, G., 1978. La zone a Loxoconcha djaffarovi Schneider (Ostracoda, Miocène supérieur) ou le Messinien de la Vallée du Rhône. Rev. Micropaleontol. 21, 106–118.] (e.g. L. djafarovi, Loxoconcha eichwaldi, Cyprideis anlavauxensis, Amnicythere palimpsesta, Zalanyiella venusta). Thus, the Lago–Mare deposits have a true thickness of about 938 m since the strata show a mean dip value of 45°. Similar thickness (530 m) has been measured in the pre-Pliocene sediments drilled at ODP Site 652, which can be correlated with Mondragone 1 by the occurrence of brackish-water forms. In both these areas syn-rift depositional processes have been suggested to explain the unusual thickness of the late Messinian sediments. Data from seismic lines have been used to reconstruct the geometry and the structural setting of the Garigliano Basin during the latest Messinian. Moreover, the analysis of the SP log integrated with the palaeoecological indications from the ostracod assemblages allows us to suggest a possible sequence stratigraphy evolution of the Garigliano Basin during the late Messinian Lago–Mare episode. Different tectonic behaviour with differences in subsidence rates between the northern and the southern Tyrrhenian Basin have been suggested since the uppermost Messinian syn-rift clastic wedges recognized in the onshore of northern Latium and Tuscany show thickness lower than that drilled at the ODP Site 652 and at the Mondragone 1 well. [Copyright &y& Elsevier]
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- 2006
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10. Italian brackish and marine ostracod fauna
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PUGLIESE, NEVIO, ARBULLA, DEBORAH, CIAMPO, Giuliano, MONTENEGRO, MARIA EUGENIA, SALVI, Gianguido, GIUSEPPE AIELLO, DIANA BARRA, ALESSANDRO BOSSIO, CAROLINA D’ARPA, COSTANZA FARANDA, ELSA GLIOZZI, ILARIA MAZZINI, ROBERTA PARISI, VERONICA ROSSI, ANTONIO RUSSO, FRANCESCO SCIUTO, Pugliese, N., Aiello, Giuseppe, Arbulla, D., Barra, Diana, Bossio, A., Ciampo, G., D’Arpa, C., Faranda, C., Gliozzi, E., Mazzini, I., Montenegro, M. E., Parisi, Roberta, Rossi, V., Russo, A., Salvi, G., Sciuto, F., Pugliese, N, Aiello, G, Arbulla, D, Barra, D, Bossio, A, Ciampo, G, D’Arpa, C, Faranda, C, Gliozzi, Elsa, Mazzini, I, MONTENEGRO M., E, Parisi, R, Rossi, V, Russo, A, Salvi, G, Pugliese N., Aiello G., Arbulla D., Barra D., Bossio A., Ciampo G., D’Arpa C., Faranda C., Gliozzi E., Mazzini I., Montenegro M.E., Parisi R., Rossi V., Russo A., Salvi G., Sciuto F., Società siciliana di Scienze naturali, Pugliese, Nevio, Giuseppe, Aiello, Arbulla, Deborah, Diana, Barra, Alessandro, Bossio, Ciampo, Giuliano, Carolina, D’Arpa, Costanza, Faranda, Elsa, Gliozzi, Ilaria, Mazzini, Montenegro, MARIA EUGENIA, Roberta, Parisi, Veronica, Rossi, Antonio, Russo, Salvi, Gianguido, and Francesco, Sciuto
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Ostracod ,data base ,marine and brackish environment ,Ostracoda Italian Seas ,Mediterranean ,OSTRACODS - Abstract
In the literature, there are many studies concerning ostracods in the Italian seas. Among the most relevant are the evergreen monograph of Müller (1894) about the ostracods from the Gulf of Naples, the publications of BONADUCE et al., 1976 and BREMAN,1976 about the Adriatic Sea, PURI et al., 1964, again about the Gulf of Naples and BONADUCE et al., 1977 about the southern Tyrrhenian Sea. In addition, different authors centered their research in smaller areas of the Italian coasts (MONTENEGRO et al., 1998; SCIUTO & ROSSO, 2002; ARBULLA et al., 2004; SCIUTO, in progress;) proposed a synthesis of the most abundant and more easily identifiable ostracods from the Italian shelves, linking their occurrence to some environmental factors such as bathymetry and substrate. Ten different ostracod assemblages were observed in relation to the type of substrate, and nine bathymetric assemblages were detected. Evident changes of the autochthonous ostracod fauna were recorded at 50-60 m, 90-100 m and 125-150 m, corresponding to the infralittoral-circalittoral, inner-middle circalittoral and middle-outer circalittoral boundaries respectively. More recently, AIELLO & BARRA (2010) have published a checklist of the Italian marine ostracods, reporting 377 ostracod species from the screening of 84 papers. In this contribution, we present an updated database of the ostracod species pertaining to the infralittoral and circalittoral zones, together with those occurring in lagoon, intertidal, submarine cave and deep water settings. Furthermore, we intend to highlight the links between the ostracod assemblages...
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- 2013
11. Climate changes at Lake Shkodra (Albania): the last 4500 years
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Laura Sadori, A Van Welden, I. Baneschi, Neil Roberts, Elsa Gliozzi, Russell N. Drysdale, Giovanni Zanchetta, Marco Giardini, I. Mazzini, Sadori, L, Zanchetta, G, Van Welden, G, Baneschi, I, Drysdale, R, Giardini, M, Gliozzi, Elsa, Mazzini, I, and Roberts, N.
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Adriatic Sea ,ostracod ,Lacustrine record ,Climate change ,Balkans ,Structural basin ,Isotopes of oxygen ,adriatic sea ,balkans ,holocene ,isotopes ,lacustrine record ,ostra- cods ,ostracods ,pollen ,tephras ,Paleontology ,Ostracod ,Tephra ,isotope ,Holocene ,geography ,Adriatic sea ,geography.geographical_feature_category ,biology ,Geology ,biology.organism_classification ,tephra ,Volcano ,Chronology - Abstract
"Lake Shkodra is a wide basin located at the Albania\/Montenegro border. Few kms of steep mountain slopes separate the lake from the Adriatic Sea, Three parallel overlapping cores down to the depth of 7.26 m have been used for palaeomagnetic, tephra, isotope, diatom, pollen, and microcharcoal analyses. The chronological framing of the record, spanning approximately the last 4500 years, has been assessed using 3 210Pb, 4 14C AMS dates al and 4 well-known tephra layers. The presence of such characteristic Italian volcanic ashes provides a relatively. good chronology for the second half of the Holocene.. The δ18Oc record indicates the presence of two prominent wet phases: one centered at ca. 4300 cal yr BP, and one at ca. 2400-2000 yr cal BP. The physiognomy of the vegetation did not suffer very much from the hydrological changes suggested by oxygen isotopes, recording. small percentage changes of AP from 4500 to ca 900 cal yr BP. However, since ca. 900 cal yr BP human impact became apparent with significant decrease in AP% and in total pollen concentration. Despite being quite homogeneous, the well preserved ostracod assemblage records. both the Medieval Warm Period and the Little Ice Age."
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- 2012
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12. Ostracoda and Mollusca biodiversity and hydrochemical features of Late Miocene brackish basins of Italy
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Pere Anadón, S. Ligios, Elsa Gliozzi, Marco Mola, Giovanni Monegato, Francesca Castorina, Daniela Esu, Pierparide Gramigna, Carmine D’Amico, Ligios, S., Anadón, P., Castorina, F., D’Amico, C., Esu, D., Gliozzi, Elsa, Gramigna, P., Mola, M., and Monegato, G.
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Trace elements ,Ostracod ,biology ,Evaporite ,Brackish water ,late Tortonian ,Paleontology ,Ostracods ,Molluscs ,Structural basin ,Late Miocene ,biology.organism_classification ,Hydrobia ,Common species ,Italy ,Space and Planetary Science ,italy ,Late Tortonian-early Messinian ,Mollusc ,Mollusca ,Geology ,molluscs ,trace elements ,stable isotopes ,late tortonian-early messinian ,ostracods ,Stable isotopes - Abstract
Late Miocene brackish ostracods and molluscs collected in three Italian basins show noticeable differences in their taxonomic composition, despite their capability of dispersing across wide geographic areas. In the Venetian-Friulian Basin (northern Italy), the upper Tortonian sediments contain oligotypic ostracod assemblages including Hemicyprideis dacica dacica, Hemicytheria pejinovicensis, and Loxoconcha cf. L. josephi and few gastropods referable to Planorbidae and Stenothyroides, which are typical of the central Paratethys. In central Italy, the brackish ostracods and molluscs recovered from upper Tortonian-lower Messinian deposits from four Tuscan basins (Volterra-Radicondoli, Velona, Baccinello-Cinigiano, and Valdelsa) display high affinity at a generic level but strong endemicity at a specific level. At Cessaniti (southern Italy), the upper Tortonian unit contains oligotypic brackish ostracods and molluscs: Mediocytherideis (Sylvestra) posterobursa, Cyprideis ruggierii, Loxoconcha cf. L. biformata, and Zonocypris membranae quadricella characterise the ostracod fauna, while Granulolabium bicinctum and Hydrobia frauenfeldi are the dominant molluscs. The recovered ostracods have a strong affinity with brackish species from central and eastern Palaeo-Mediterranean areas, whereas the molluscs present a Paratethyan origin. Despite the fact that the basins are all brackish and partly coeval, the systematics of these assemblages highlights the absence of common species among the three studied areas. Geochemical analyses (stable isotopes and trace elements) are performed on ostracods, and 87Sr/ 86Sr ratios are established in molluscs and echinoids. The results suggest brackish environments with different compositions and origins of solutes in the three different areas. The Tuscan basins are characterised by brackish waters, with NaCl-enriched waters coming from aquifers of Triassic evaporite bedrock. The brackish deposits of the Venetian-Friulian Basin and Cessaniti are true marginal marine environments, although the northern basin may have been influenced by both the Paratethyan Sava Basin and the northern portion of the Palaeo-Mediterranean water bodies. © 2012 Elsevier Masson SAS., This research has been supported by the Istituto di Geologia Ambientale e Geoingegneria (IGAG), CNR of Roma (Italy), Commessa TA.P05.009, by the research grants to Elsa Gliozzi provided by the Department of Earth Sciences of University Roma Tre, and the research grants to D. Esu provided by ‘‘Sapienza’’ University of Roma. P. Anado´ n’s work was supported by research grant CGL 2008-00594, Ministerio de Ciencia e Innovacio´ n, Spain.
- Published
- 2012
13. EARLY PLIOCENE BRACKISH AND FRESHWATER OSTRACODA FROM THE VALDELSA BASIN (TUSCANY, CENTRAL ITALY)
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Medici, M. C., Ceci, M. E., Elsa Gliozzi, Medici, MARIA CHIARA, Ceci, M. E, and Gliozzi, Elsa
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Pliocene ,lcsh:QE1-996.5 ,Paleo-Mediterranean ,Ostracods ,Paleobiogeography ,lcsh:Geology ,lcsh:Paleontology ,Ostracods, Italy, Pliocene ,Tuscany ,Brackish lakes ,Taxonomy ,Paratethys ,lcsh:QE701-760 - Abstract
The taxonomic study of Early Pliocene ostracods from the Valdelsa Basin (Tuscany, central Italy) has been performed on 12 samples. Fifteen species, referable to eight genera, have been identified. Eight are known species (Darwinula stevensoni (Brady & Robertson), Candona (Neglecandona) neglecta Sars, Pseudocandona albicans (Brady), Pseudocandona cf. P. eremita (Vejdovsky), Candonopsis arida Sieber, Ilyocypris cf. I. monstrifica (Norman), Ilyocypris bradyi Sars and Mixtacandona cf. M. tabacarui Danielopol & Cvetkov. Six species are new and have been referred to the genera Cyprideis (C. rectangularis n. sp.), Paralimnocythere (P. dictyonalis n. sp. and P. toscana n. sp.) and Candona (Neglecandona) [C. (N.) dorsoreticulata n. sp., C. (N.) subtilis n. sp., C. (N.) sambucensis n. sp.]. Two species have been left in open nomenclature, due to scarcity of material and poor preservation (Candona (Neglecandona) sp. and Cyclocypridinae indet.). The Early Pliocene ostracods of the Valdelsa Basin show palaeobiogeographical affinities with both the Central and Western European faunas and the Balkan candonids. The occurrence of ostracods with Balkan and Eastern Europe affinity is also known from the more ancient Italian deposits of the late Tortonian-early Messinian and latest Messinian age. In the first case, the ostracods widespread by passive dispersal, whereas during the latest Messinian they actively dispersed in the Palaeo-Mediterranean area due to its connection with the central and eastern Paratethyan domains., Rivista italiana di Paleontologia e Stratigrafia, Vol 117, No 3
- Published
- 2011
Catalog
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