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Late Quaternary paleoceanography of the Pervenets Canyon area of the Bering Sea: evidence from the diatom flora

Diatom Research

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Abstract

Sediments from three gravity cores from an east-west shelf-to-slope transect along the axis of Pervenets Canyon in the northern Navarin basin, Bering Sea were analyzed for diatoms. The diatom floras present in the cores were divided into four assemblages. The Bering Basin (deep water open ocean) and Sea Ice (ice cover at least six months per year) Assemblages were dominant in each core. The taxa that comprise the Bering Shelf Assemblage (continental shelf) indicate that downslope transport plays only a minor part in the development of the thanatocenoses. The presence (up to 10% of the total valve count) of the Productivity Assemblage, which consists mainly of poorly silicified, easily dissolved taxa, indicates that nutrient flux is relatively high in the region. Several taxa can be used as proxy indicators for specific water masses. The relative downcore abundance of these taxa was used to approximate the Pleistocene-Holocene boundary (recognized in Core 80-65 at a depth of about 75 cm). -from Author

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Late Quaternary paleoceanography of the Pervenets Canyon area of the Bering Sea: evidence from the diatom flora
Series title:
Diatom Research
Volume
8
Issue:
1
Year Published:
1993
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Diatom Research
First page:
159
Last page:
170