Pliocene-lower Pleistocene chronostratigraphy; a re-evaluation of Mediterranean type sections

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doi: 10.1130/0016-7606(1991)103<1049:PLPCAR>2.3.CO;2
Author(s): Rio, D.; Sprovieri, R.; Thunell, R.
Author Affiliation(s): Primary:
Univ. Padova, Dip. Geol., Padua, Italy
Univ. Palermo, Italy
Univ. S.C., United States
Volume Title: Geological Society of America Bulletin
Source: Geological Society of America Bulletin, 103(8), p.1049-1058. Publisher: Geological Society of America (GSA), Boulder, CO, United States. ISSN: 0016-7606 CODEN: BUGMAF
Note: In English. 76 refs.; 2 tables, sects., strat. cols., sketch map
Summary: The Pliocene-Pleistocene stages defined for the Mediterranean region are generally used as the standard chronostratigraphic units for the upper Neogene and Quaternary. The recently developed calcareous plankton bio-chronology 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. Our 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, we propose a revised chronostratigraphic scheme for this time period.A tripartite subdivision is proposed for the Pliocene Series. The Zanclean Stage is retained for the lower Pliocene, representing the interval from the Miocene/Pliocene boundary (ca. 4.93 Ma) to ca. 3.5 Ma. The middle Pliocene is represented by the Piacenzian Stage, and it incorporates strata deposited from ca. 3.5 to 2.5 Ma. None of the currently used Pliocene stages fully represents the upper Pliocene (ca. 2.5 to 1.6 Ma). As a result, late Pliocene time lacks an adequately defined chronostratigraphic unit.The Selinuntian Stage appears to be the most appropriate stage for the lower Pleistocene (ca. 1.6 to 0.8 Ma). It can be divided into three stratigraphically continuous substages (Santernian, Emilian, and Sicilian). The Calabrian Stage, which is commonly used to designate the lowest part of the Pleistocene, should be abandoned because its stratotype does not include a record of the first 500,000 yr of Pleistocene time.
Year of Publication: 1991
Research Program: ODP Ocean Drilling Program
Key Words: 03 Geochronology; 12 Stratigraphy, Historical Geology and Paleoecology; 24 Surficial Geology, Quaternary Geology; Algae; Biostratigraphy; Cenozoic; Chronostratigraphy; Correlation; Europe; Foraminifera; Geochronology; Invertebrata; Italy; Leg 107; Lower Pleistocene; Magnetostratigraphy; Mediterranean Sea; Mediterranean region; Microfossils; Nannofossils; Neogene; Ocean Drilling Program; Paleomagnetism; Plantae; Pleistocene; Pliocene; Protista; Quaternary; Southern Europe; Stratigraphic boundary; Stratigraphic units; Stratigraphy; Tertiary; Thallophytes; Time scales; Type sections; Tyrrhenian Sea; West Mediterranean
Record ID: 1991038623
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute.

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