Sandstone petrographic evidence and the Chugach-Prince William terrane boundary in southern Alaska

Geology
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Abstract

The contact between the Upper Cretaceous Valdez Group and the Paleocene and Eocene Orca Group has been inferred to be the boundary between the Chugach and the Prince William tectonostratigraphic terranes. Sandstone petrographic data from the Prince William Sound area show no compositional discontinuity across this contact. These data are best explained by considering the Valdez and Orca Groups to be part of a single terrane - a thick flysch sequence derived primarily from a progressively unroofing magmatic arc with increasing input from subduction-complex sources through time.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Sandstone petrographic evidence and the Chugach-Prince William terrane boundary in southern Alaska
Series title Geology
DOI 10.1130/0091-7613(1988)016<0456:SPEATC>2.3.CO;2
Volume 16
Issue 5
Year Published 1988
Language English
Publisher GSA Publications
Contributing office(s) Alaska Science Center
Description 5 p.
First page 456
Last page 460
Country United States
State Alaska
Other Geospatial Chugach terrane, Prince William Sound, Prince William terrane
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