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Seismic-reflection signature of cretaceous continental breakup on the Wilkes Land margin, Antarctica

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Abstract

The passive (rifted) continental margin of Wilkes Land, Antarctica, is characterized on seismic reflection records by (i) in the south, a block-faulted sequence of highly stratified continental beds overlain by two distinct unconformities; (ii) a transitional, greatly thinned continental crust overlain by material interpreted to be flood basalt; and (iii) in the north, oceanic crust with a boundary ridge at its edge. The Mohorovic??ic?? discontinuity can be followed across the continent-ocean boundary and shows a progressive thinning of continental crust to a minimum of 2.5 kilometers at its northern edge.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Seismic-reflection signature of cretaceous continental breakup on the Wilkes Land margin, Antarctica
Series title:
Science
Volume
229
Issue:
4718
Year Published:
1985
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Science
First page:
1082
Last page:
1084