Ebridian and silicoflagellate biostratigraphy from Eocene McMurdo erratics and the Southern Ocean

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doi: 10.1029/AR076p0099
Author(s): Bohaty, Steven M.; Harwood, David M.
Author Affiliation(s): Primary:
University of Nebraska at Lincoln, Department of Geosciences, Lincoln, NE, United States
Other:
Kent State University, Australia
Volume Title: Paleobiology and paleoenvironments of Eocene rocks, McMurdo Sound, East Antarctica
Volume Author(s): Stilwell, Jeffrey D., editor; Feldmann, Rodney M.
Source: Paleobiology and paleoenvironments of Eocene rocks, McMurdo Sound, East Antarctica, edited by Jeffrey D. Stilwell and Rodney M. Feldmann. Antarctic Research Series, Vol.76, p.99-159. Publisher: American Geophysical Union, Washington, DC, United States. ISSN: 0066-4634. ISBN: 978-1-118-66822-1 CODEN: ANTSA4
Note: In English. 141 refs.; illus., incl. 13 plates, 9 tables, sketch map
Summary: Ebridians are abundant and diverse in erratics from McMurdo Sound and indicate an age of late middle to late Eocene. This age assignment is based on reference to ebridian biostratigraphic ranges from Ocean Drilling Project (ODP) Site 748B (Kerguelen Plateau) and CIROS-1 drillcore (McMurdo Sound). Correlation to nannofossil stratigraphy in these cores suggests an absolute age range of 43.7 to 33.7 Ma for the erratics, and the absence of certain ebridian and silicoflagellate taxa in CIROS-1 further constrains the age to >34.9 Ma. Two ebridian biostratigraphic zones for the middle Eocene to lower Oligocene section of ODP Site 748B are proposed: the upper middle to upper Eocene Micromarsupium anceps Partial Range Zone and the lower Oligocene Hermesinum geminum Partial Range Zone. A new ebridian species is described from the CIROS-1 drillcore, Pseudammodochium lingii. (Modified author abstract)
Year of Publication: 2000
Research Program: ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Antarctic Ocean; Antarctica; Assemblages; Biogeography; Biostratigraphy; Biozones; Cenozoic; Clastic rocks; Clastic sediments; Correlation; East Antarctica; Ebridians; Eocene; Erratics; Faunal list; Glacial environment; Invertebrata; Kerguelen Plateau; Leg 120; Lithofacies; McMurdo Sound; Microfossils; Morphology; New taxa; ODP Site 748; Ocean Drilling Program; Paleogene; Protista; Pseudammodochium lingii; Range; Ross Sea; Sedimentary rocks; Sediments; Silicoflagellata; Southern Ocean; Taxonomy; Tertiary
Coordinates: S780000 S750000 E1670000 E1623000
Record ID: 2001027992
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute.