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Cenozoic environmental changes along the East Antarctic continental margin inferred from regional seismic stratigraphy

Open-File Report 2007-1047-SRP-005

By:
, ,
DOI: 10.3133/ofr20071047SRP005

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Abstract

We interpret ~40,000 km of multichannelseismic reflection lines collected by the Russian Antarctic Expedition along the East Antarctic continental margin between 32° E and 115° E, and present a revised seismic stratigraphic model for depositional paleoenvironments of the region. Variations in acoustic facies characteristics observed across major seismic horizons are correlated with paleoenvironmental changes deciphered from Antarctic drilling data and deep-sea “proxy” records. Our results, as well as otherstudies, indicate that the East Antarctic margin was glaciated at different times. Glacial ice first reached the western Wilkes Land margin in the Middle Eocene and then advanced onto most parts ofthe East Antarctic continentalshelf during the earliest Oligocene. During the Neogene, bottom currents deposited a variety of drift deposits along the margin

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Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Cenozoic environmental changes along the East Antarctic continental margin inferred from regional seismic stratigraphy
Series title:
Open-File Report
Series number:
2007-1047-SRP-005
DOI:
10.3133/ofr20071047SRP005
Year Published:
2007
Language:
English
Publisher:
U.S. Geological Survey
Publisher location:
Reston, VA
Description:
4 p.
Larger Work Type:
Report
Larger Work Subtype:
USGS Numbered Series
Other Geospatial:
Antarctica
Additional Online Files(Y/N):
N