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Speculations on processes responsible for mesoscale current lineations on the continental shelf, southern California

Marine Geology

By:
DOI: 10.1016/0025-3227(80)90132-2

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Abstract

A side-scan sonar survey of San Pedro shelf, California, reveals areas of mesoscale current lineations oriented approximately north-northeast in water depths of 20-25 m. Widths of sand ribbons range from 40 to 120 m and intervening erosional furrows, from 15 to 50 m. A conceptual model shows that the scale and orientation of current lineations agree with the dimensions and axial directions of Langmuir circulations theoretically generated by a combination either of southerly and southwesterly winds with regular trains of swell from the southern hemisphere or of two sets of wave trains crossing from the south and west. These longitudinal bedforms indicate shore-normal sediment transport at the times and on the areas of the shelf when and where they have been observed.

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Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Speculations on processes responsible for mesoscale current lineations on the continental shelf, southern California
Series title:
Marine Geology
DOI:
10.1016/0025-3227(80)90132-2
Volume
34
Issue:
1-2
Year Published:
1980
Language:
English
Contributing office(s):
Coastal and Marine Geology Program
Description:
10 p.
First page:
M9
Last page:
M18
Country:
United States
State:
California
Other Geospatial:
San Pedro shelf
Online Only (Y/N):
N
Additional Online Files(Y/N):
N