Biotic response of Tethyan bathyal ostracodes through the Eocene-Oligocene transition; the composite faunal record from the Massicore and Massignano Global Stratotype Section and Point (east central Italy)

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doi: 10.1016/j.marmicro.2013.03.005
Author(s): Slotnick, Benjamin S.; Schellenberg, Stephen A.
Author Affiliation(s): Primary:
San Diego State University, Department of Geological Sciences, San Diego, CA, United States
Volume Title: Marine Micropaleontology
Source: Marine Micropaleontology, Vol.103, p.68-84. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0377-8398 CODEN: MAMIDH
Note: In English. 85 refs.; illus., incl. 2 plates, 2 tables, sketch map
Summary: The Eocene-Oligocene Transition (EOT) is marked by a double-stepped positive δ18O excursion of ∼1.3 ppm and a deepening of the calcium compensation depth (CCD) interpreted to represent marked Antarctic glaciation and global ocean-atmosphere cooling (i.e., Oi-1 event). A ∼0.5-m (∼55-70 kyr) resolution ostracode faunal study of the Massicore, drilled up-section from the Italian Massignano Quarry containing the Eocene-Oligocene Global Stratotype Section and Point (GSSP), revealed a relative increase in Krithe and decreases in faunal evenness and Shannon Index correlative to the Oi-1 event. These transient faunal changes may reflect local water column changes (e.g., export production) or intensified thermohaline flow of cooler deep waters through the paleotethyan seaway. Comparison of these Massicore ostracode faunal data to previously-published Massignano Quarry ostracode faunal data reveals similar relative abundances among common taxa where the study intervals overlap, and thereby provide a more complete Tethyan ostracode record spanning all of C13n and the broader EOT at the GSSP locality. Abstract Copyright (2013) Elsevier, B.V.
Year of Publication: 2013
Research Program: ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Ancona Italy; Arthropoda; Assemblages; Cenozoic; Cluster analysis; Communities; Crustacea; Dinoflagellata; East Pacific; Eocene; Equatorial Pacific; Europe; Foraminifera; Invertebrata; Italy; Leg 199; Lower Oligocene; Mandibulata; Marches Italy; Marine environment; Massicore; Massignano Italy; Microfossils; Morphology; North Pacific; Northeast Pacific; ODP Site 1218; Ocean Drilling Program; Oligocene; Ostracoda; Pacific Ocean; Paleo-oceanography; Paleoecology; Paleoenvironment; Paleogene; Palynomorphs; Protista; Southern Europe; Statistical analysis; Stratigraphic boundary; Stratotypes; Tertiary; Tethys; Upper Eocene
Coordinates: N085300 N085300 W1352200 W1352200
N430300 N430300 E0134800 E0134800
Record ID: 2013100843
Copyright Information: GeoRef, Copyright 2017 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands