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Tidally generated sea-floor lineations in Bristol Bay, Alaska, USA

Geo-Marine Letters

By:
, , , and
DOI: 10.1007/s003670050112

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Abstract

Highly reflective linear features occur in water depths of 20-30 m in northern Bristol Bay (Alaska, USA) and are, in places, over 600 m in length. Their length-to-width ratio is over 100:1. The lineations are usually characterized by large transverse ripples with wavelengths of 1-2 m. The lineations trend about N60??E, and are spaced between 20 and 350 m. Main tidal directions near the lineations are N60??E (flood) and S45??W (ebb), which are parallel to subparallel to the lineations. They suggest that the lineations may be tidally generated. The lineations may be bright sonar reflections from a winnowed lag concentrate of coarse sand.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Tidally generated sea-floor lineations in Bristol Bay, Alaska, USA
Series title:
Geo-Marine Letters
DOI:
10.1007/s003670050112
Volume
19
Issue:
4
Year Published:
1999
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Geo-Marine Letters
First page:
219
Last page:
226
Number of Pages:
8