A local deep-water sediment failure on the NW slope of the UK

Scottish Journal of Geology - Tập 27 Số 2 - Trang 107-111 - 1991
P. Strachan1, D. Evans
1Energy Simulation Research Unit, University of Strathclyde, Glasgow

Tóm tắt

Synopsis An example is described, from seismic evidence, of a local deep-water sediment failure on the slope to the west of the Isle of Lewis, an area which otherwise appears to be generally stable. The feature is about 4 km long in the downslope direction and lies above an escarpment at an approximate water depth of 1100 m. The loss of layering on the reflection profile, and the existence of infilled depressions, suggests that excess pore water pressures have been generated and subsequently dissipated. It is conjectured that the failure has been triggered by an earthquake, or possibly by internal wave action. The sediment body is thought to have failed by liquefaction acting retrogressively upslope.

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Thông tin
Thông tin xuất bản

Scottish Journal of Geology

Tập 27 Số 2

107-111

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