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Sonographs of submarine sediment failure caused by the 1980 earthquake off northern California

Geo-Marine Letters

By:
,
DOI: 10.1007/BF02462754

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Abstract

In 1980, a large earthquake caused extensive sediment failure on the shallow continental shelf off the Klamath River in northern California. Side-scan sonography was used to complement detailed geophysical profiling in identifying specific features and resolving modes of failure. The features include a nearly flat failure terrace mantled with sand boils, collapse craters and sediment flows, and bounded on the seaward side by a meandering continuous toe ridge. Seaward of the terrace lies a compression zone delineated by small pressure ridges. Our findings indicate a temporal progression of failure from lique-faction of shallow subsurface sand to lateral spread of intact blocks to sediment collapse and flow. ?? 1982 A. M. Dowden, Inc.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Sonographs of submarine sediment failure caused by the 1980 earthquake off northern California
Series title:
Geo-Marine Letters
DOI:
10.1007/BF02462754
Volume
2
Issue:
3-4
Year Published:
1982
Language:
English
Publisher:
Springer-Verlag
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Geo-Marine Letters
First page:
135
Last page:
141