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Evidence for a stronger oxygen-minimum zone off central California during late Pleistocene to early Holocene.

Geology

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Abstract

Of 31 deep-sea cores collected along the central California continental slope, 18 have distinctly laminated sediment at depth. The cores with laminated facies are restricted to water depths between 508 and 1508 m. 14C dates yield an extrapolated age of 4700 B.P. for the top of the uppermost laminated unit. Comparisons of the diatom flora in the laminated couplets with diatom floras in a 13-month sediment-trap record suggest that the laminations are varvelike couplets of seasonal sedimentation. The laminated facies represent a period from the last global deglaciaton to early Holocene when the oxygen-minimum zone along the northeastern Pacific Ocean was stronger than at present. A stronger oxygen-minimum zone during this time is inferred to be the result of intensified upwelling. -from Authors

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Evidence for a stronger oxygen-minimum zone off central California during late Pleistocene to early Holocene.
Series title:
Geology
Volume
14
Issue:
8
Year Published:
1986
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Geology
First page:
691
Last page:
694
Number of Pages:
4