Sonographs of submarine sediment failure caused by the 1980 earthquake off northern California
Geo-Marine Letters
By: M.E. Field and R. K. Hall
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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.
| 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 |
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