1,721,093 research outputs found
Nannofossili calcarei e Foraminiferi bentonici del Barremiano - Aptiano inferiore di Cala Bianca (Sicilia occidentale)
No full textBiostratigrafia integrata del Pliocene - Pleistocene inferiore mediterraneo , in un'ottica di Stratigrafia Sistemica.
No full text
The Gelasian Stage: a proposal of a new chronostratigraphic unit of the Pliocene Series.
No full textA new Stage, the Gelasian, is proposed as third upper subdivision of the Pliocene Series. The GSSP of the base of the Gelasian Stage and of the Middle Pliocene - Upper Pliocene boundary is coincident with a "sapropel' level which outcrops in the Monte San Nicola section, near Gela. This level corresponds to the Mediterranean Precessional Related Sapropel 250 of Hilgen (1991) and has an astrochronological age of 2.589 Ma. It correspondes to the oxygen isotopic Stage 103 and in the boundary stratotype section it outcrops 1 meter above the Gauss-Matuyama paleomagnetic boundary
Calcareous plankton biostratigraphy and biochronology of the Pliocene-Lower Pleistocene succession of the Capo Rossello area, Sicily
No full textIn the first part of this paper we present the calcareous nannofossil biostratigraphy of the Capo Rossello section (Sicily), which suggests that a sedimentary gap exists at the contact between the "Trubi" and the overlying Monte Narbone Formation, close to the top of the proposed Zanclean stratotype. This suggestion is supported by the planktonic foraminiferal results and field observations. In contrast, the transition from the "Trubi" to the Monte Narbone Formation is well exposed, gradational and biostratigraphically continuous in the nearby section of Punta Piccola. A composite of the Capo Rossello and Punta Piccola sections serves as a good biostratigraphic reference for the Pliocene of the Mediterranean. In a second part of this paper, we have attempted to update the Mediterranean Pliocene time framework by integrating all of the available biostratigraphic, biochronologic, chronostratigraphic, paleomagnetic and radiometric data. © 198
Studio micropaleontologico della sezione del Cretacico Inferiore di Licodia Eubea (Catania).
No full textPLIOCENE LOWER PLEISTOCENE CHRONOSTRATIGRAPHY - A REEVALUATION OF MEDITERRANEAN TYPE SECTIONS
No full textThe recently developed calcareous plankton biochronology based on results from Ocean Drilling Program Leg 107 and numerous outcrop sections provides the necessary time control for evaluating the ages and stratigraphic relationships for the various Pliocene-Pleistocene stages and their associated stratotypes. Results indicate that the currently accepted stratotypes do not provide a continuous stratigraphic representation for all of Pliocene-early Pleistocene time. On the basis of these findings, a revised chronostratigraphic scheme for this time period is propose
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