Successive extinctions of muricate planktonic Foraminfera (Morozovelloides and Acarinina) as a candidate for marking the base Priabonian

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doi: 10.1127/0078-0421/2012/0023
Author(s): Wade, Bridget S.; Fucek, Vlasta Premec; Kamikuri, Shin-Ichi; Bartol, Milos; Luciani, Valeria; Pearson, Paul N.
Author Affiliation(s): Primary:
University of Leeds, School of Earth and Environment, Leeds, United Kingdom
Other:
Industrija Nafte, Croatia
Kochi University, Japan
Ivan Rakovec Institute of Palaeontology ZRC SAZU, Slovenia
Universita di Ferrara, Italy
Cardiff University, United Kingdom
Volume Title: Newsletters on Stratigraphy
Source: Newsletters on Stratigraphy, 45(3), p.245-262. Publisher: Gebrüder Bornträger, Berlin-Stuttgart, Germany. ISSN: 0078-0421 CODEN: NLSGAO
Note: In English. 52 refs.; illus., incl. 3 tables
Summary: The formal placement of the Global Stratotype Section and Point (GSSP) for the base of the Priabonian (Upper Eocene) is currently under discussion. We suggest that two closely spaced extinctions of planktonic Foraminifera at approximately 38 Ma offer excellent potential for long-distance correlation in marine strata. The double extinction, which occurred within 11 kyr, involved the loss of the distinctive 'muricate' taxa Morozovelloides and the large acarininids. We present detailed biostratigraphic analyses from the Adriatic Sea and re-evaluate the magnetobiochronology of the extinction of these muricate taxa from previous studies from Ocean Drilling Program Site 1052 (western North Atlantic) and the Alano di Piave Section (NE Italy). We show these bioevents are robust, synchronous across the Atlantic Ocean and among the best calibrated and most easily recognised foraminiferal biohorizons for the entire Cenozoic. The two separate but very closely spaced bioevents provide a means for testing for completeness in the proposed stratotype and other sections that contain these fossils. The muricate extinctions coincide with a large turnover in radiolarians, within the short Subchron C17n.3n, providing distinct correlation horizons in siliceous and terrestrial sediments. We propose that the lithological level at 57.62 m in the Alano Section associated with the HO of Morozovelloides crassatus define the base of the Priabonian and the Middle/Upper Eocene boundary.
Year of Publication: 2012
Research Program: ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Acarinina; Adriatic Sea; Alano di Piave Section; Atlantic Ocean; Bartonian; Biostratigraphy; Blake Nose; Blake Plateau; Cenozoic; East Mediterranean; Eocene; Europe; Extinction; Foraminifera; Fossils; Invertebrata; Italy; Leg 171B; Mediterranean Sea; Microfossils; Middle Eocene; Morozovelloides; North Atlantic; Northeastern Italy; ODP Site 1052; Ocean Drilling Program; Paleogene; Planktonic taxa; Priabonian; Protista; Southern Europe; Stratigraphic boundary; Stratotypes; Tertiary; Upper Eocene
Coordinates: N295705 N295705 W0763736 W0763736
Record ID: 2015053379
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Geoline, Bundesanstalt fur Geowissenschaften und Rohstoffe, Hanover, Germany