Search results for "BIOSTRATIGRAPHY"

Mineralogical variability of Callovo-Oxfordian clays from the Paris Basin and the Subalpine Basin.

2006

High-resolution clay mineralogical data at the Middle/Upper Jurassic boundary from the French Subalpine Basin, the Jura Mountains and the Paris Basin (ANDRA boreholes) from Callovo-Oxfordian clayey deposits allow spatial and temporal terrigenous flux evolution to be considered over a period of 6 to 7 Myr. Recorded diachronisms of major mineralogical changes and complex clays distribution at the Paris Basin scale result to combined palaeogeographic/eustatic variations and climate input. In the French Subalpine Basin, mineralogical homogeneity confirms the burial diagenesis influence, but other terrigenous supplies must be involved in contrast to the Paris Basin domains. Volcanogenic clays (b…

Calcareous nannofossil and planktonic foraminifera biostratigraphy of selected Pliocene and Pleistocene laminites from Southern Italy.

2009

INTEGRATED CALCAREOUS PLANKTON BIOSTRATIGRAPHY OF SELECTED MIOCENE SUCCESSIONS IN THE NORTHERN CALABRIA (ITALY).

2005

An integrated calcareous plankton biostratigraphic approach on six sections cropping out in Northern Calabria allowed to define a revised chronostratigraphic framework for Tortonian-Messinian deposits. Four sections have been investigated in the Amantea Basin (Timpone Napoli, Vallone Salina, Case Vespano, and Cozzo Salice) and two in the Rossano Basin (Vallone Casino and Cozzo Sant'Isidoro). Biostratigraphic analyses have been based on quantitative counting of planktonic foraminifers and semiquantitative counting of nannofossils. The Timpone Napoli and Vallone Salina sections are Late Tortonian in age and referable to the Globorotalia suterae Zone. In terms of nannofossils zonal scheme thes…

Calcareous Nannofossil Biostratigraphy of the Central Mediterranean Basin during the last 430 000 years

2009

Quantitative analyses on over 2300 samples were carried ut on late Quaternary calcareous nannofossil assemblages from a central Mediterranean Sea sedimentary sequence (ODP Site 963A). Our results indicate that Emiliania huxleyi dominated the assemblages between 0 and 45.7 kyr BP; Gephyrocapsa muellerae between 45.7 and 177.3 kyr BP; small Gephyrocapsa between 177.3 and 263.5 kyr BP; Gephyrocapsa caribbeanica from 263.5 kyr BP down to the basal sample of our investigation, at about 430 kyr BP A comparison with similar reports from Atlantic Ocean sites indicates that the boundaries of the acme intervals identified in this study fall within the same Marine Isotopic Stages as the Atlantic Ocean…

Calcareous plankton Biostratigraphy and Chronostratigraphy of selected Pliocene and Pleistocene laminites from Southern Italy

2009

FACIES HETEROGENEITY AND SEDIMENTARY PROCESSES ALONG A TECTONICALLY-CONTROLLED CARBONATE SLOPE: A CASE STUDY FROM THE CRETACEOUS OF WESTERN SICILY (I…

2020

Late Carnian-Early Norian ammonoids from the GSSP candidate section Pizzo Mondello (Sicani mountain, Sicily).

2012

A small collection of ammonoids from the Upper Triassic Scillato Formation at Pizzo Mondello (Agrigento, Sicily) is studied. The specimens were collected in a framework of a project aimed at providing an integrated high-resolution bio-chronostratigraphic support to the Upper Carnian-Norian magnetostratigraphic scale defined at this site, that is located in an historical area from which G.G. Gemmellaro collected the Upper Triassic of ammonoids monographed at the beginning of the XX century. The specimens from Pizzo Mondello were bed-by-bed sampled and represent the first collection of Upper Triassic ammonoids described from Sicily since Gemmellaro time. Quite several levels of the Pizzo Mond…

Early Jurassic (Sinemurian to basal Toarcian) ammonites of the Brescian Prealps (Southern Alps, Italy).

2017

This work provides a more precise up-to-date biostratigraphical framework of the Early Jurassic ammonite succession of the Brescian Prealps with more than seventy taxa for the Sinemurian, Pliensbachian and basal Toarcian corresponding to a about 30 horizons or faunal assemblages rather well correlable with the NW European standard zonation. These results are supported with already published data, new data from recent field investigations, revised contributions of different authors and with the study of the historical collection of the Museum of Natural Sciences of Brescia (Northern Italy). The biohorizons are referred to the Lower Jurassic carbonate series of the Brescian Prealps, cropping …

A lacustrine record of the early stage of the Miocene Climatic Optimum in Central Europe from the Most Basin, Ohře (Eger) Graben, Czech Republic.

2014

AbstractThis study reports on a ~ 150 m thick macrofossil-barren sequence of siliciclastic sediments from a Burdigalian age (Early Miocene) freshwater lake. The lake was located within an incipient rift system of the Most Basin in the Ohře (Eger) Graben, which was part of the European Cenozoic Rift System, and had an original area of ≈ 1000 km2. Sediments from the HK591 core that cover the entire thickness of the lake deposits and some of the adjacent stratigraphic units were analysed by X-ray fluorescence spectroscopy (a proxy for element composition) and magnetic polarity measurement. The element proxies were subjected to frequency analysis, which provided estimated sedimentation rates, a…

Paleoclimatic and Paleoceanographic reconstruction of the Pleistocene – Holocene through the study of planktonic foraminifera of two sediment cores, …

2014

The study of climate and oceanographic setting in the recent past plays and important role to prevent what we can expect for the future. This research project is based on the study of two sedimentary cores (ATA13-OF-KT1 and ATA13-OF-KT18), collected during OCEANOGRAFLU 2013 oceanographic survey in Atlantic Ocean, southwestward of the Azores Islands, near the Mid-Atlantic ridge. In agreement with members of Paleobiodiversity and Paleoenvironmental Research Center belonging to the Department of Earth History (MNHN) of Paris, I’ll have to study these two cores, under the supervision of Prof. Annachiara Bartolini, member of this research unit, and Prof. Antonio Caruso (DiSTeM, University of Pal…