Puzzling mass movement features in the Navarinsky Canyon head,Bering Sea |
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| Authors: | Paul R Carlson Herman A Karl Brian D Edwards |
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| Institution: | (1) U.S. Geological Survey, 345 Middlefield Rd., 94025 Menlo Park, CA |
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| Abstract: | Two types of morphologic features in the head of Navarinsky Canyon are attributed to mass movement of near-surface sediment.
A series of pull-aparts is located downslope of large sand waves. These pull-aparts, possibly induced by liquefaction, affect
the upper 5 to 10 m of sandy sediment (water depths 350 to 600 m) on a 1o slope. A hummocky elongate mound of muddy sand (water depths 550 to 800 m) contains chaotic internal reflectors to a subbottom
depth of 30 to 40 m and possibly is the product of a shallow slide. We speculate that Holocene seismicity is the likely triggering
mechanism. |
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