Acoustic evidence for gas-charged sediment in the abyssal Aleutian Basin, Bering Sea, Alaska
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Open-File Report↗
Geology topics
R. K. Hall
Publications and source records attributed to R. K. Hall.
The search for the S.S. Puerto Rican using side-scan sonar; L1-85-NC and L2-85-NC cruise report
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Open-File Report↗
Sonographs of submarine sediment failure caused by the 1980 earthquake off northern California
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.
Geo-Marine Letters↗