The need to standardise stratigraphical subdivisions of continuous marine sedimentary successions that out- crop for hundreds metres, using clearly defined points fixed in the field is strongly felt. A proposal is presented here to formalize regional stages for the Lower Pleisto- cene (Calabrian) and for the Middle Pleistocene (Ion- ian) in Italy. The sections are well exposed, carefully investigated using multiple criteria (an integrated strati- graphical approach) and located in the central part of the Mediterranean. This area is recognized worldwide as a classical region for the Neogene and the Pleistocene sequences. The terrestrial record is directly correlated with the deep-sea record, as determined from ODP Sites 653 (Tyrrhenian Sea), 963 (Sicily Channel) and 964 (Ion- ian Sea) from the central Mediterranean. The present for- mal proposal is consistent with the INQUA and ICS deci- sion to define and correlate the Plio/Pleistocene bound- ary (GSSP at Vrica) within the Olduvai Subchron, at 1.81 My, the Lower/Middle Pleistocene boundary at the Matuyama/Brunhes reversal at 0.78 My and the Middle/ Upper Pleistocene boundary with the base of MIS 5, approximately 0.13My. The present proposal also is con- sistent with the call for stage unit stratotypes that emphasize both the physical content of a stage and its boundaries (Hilgen et al., 2006).
Calabrian and Ionian: A proposal for the definition of Mediterranean stages for the Lower and Middle Pleistocene
CAPRARO, LUCA;RIO, DOMENICO;
2006
Abstract
The need to standardise stratigraphical subdivisions of continuous marine sedimentary successions that out- crop for hundreds metres, using clearly defined points fixed in the field is strongly felt. A proposal is presented here to formalize regional stages for the Lower Pleisto- cene (Calabrian) and for the Middle Pleistocene (Ion- ian) in Italy. The sections are well exposed, carefully investigated using multiple criteria (an integrated strati- graphical approach) and located in the central part of the Mediterranean. This area is recognized worldwide as a classical region for the Neogene and the Pleistocene sequences. The terrestrial record is directly correlated with the deep-sea record, as determined from ODP Sites 653 (Tyrrhenian Sea), 963 (Sicily Channel) and 964 (Ion- ian Sea) from the central Mediterranean. The present for- mal proposal is consistent with the INQUA and ICS deci- sion to define and correlate the Plio/Pleistocene bound- ary (GSSP at Vrica) within the Olduvai Subchron, at 1.81 My, the Lower/Middle Pleistocene boundary at the Matuyama/Brunhes reversal at 0.78 My and the Middle/ Upper Pleistocene boundary with the base of MIS 5, approximately 0.13My. The present proposal also is con- sistent with the call for stage unit stratotypes that emphasize both the physical content of a stage and its boundaries (Hilgen et al., 2006).Pubblicazioni consigliate
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