Ages of sediments recovered by Core GC-11 in the southern Bering Sea

Composition and distribution of benthic foraminifers together with isotopic data on Upper Pleistocene and Holocene sediments from the southern Bering Sea demonstrate variations in bottom water properties during the last 54 ka. Their abundance increased to some extent during a short periods correspon...

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Bibliographic Details
Main Authors: Khusid, Tatyana A, Basov, Ivan A, Gorbarenko, Sergey A, Chekhovskaya, Maria P
Format: Dataset
Language:English
Published: PANGAEA - Data Publisher for Earth & Environmental Science 2006
Subjects:
DEPTH, sediment/rock
Age, dated
Age model
Gravity corer
Age, radiocarbon
Age model in radiocarbon 14C ages
Archive of Ocean Data ARCOD
Bering Sea
Online Access:https://dx.doi.org/10.1594/pangaea.745203
https://doi.pangaea.de/10.1594/PANGAEA.745203
Description
Summary:Composition and distribution of benthic foraminifers together with isotopic data on Upper Pleistocene and Holocene sediments from the southern Bering Sea demonstrate variations in bottom water properties during the last 54 ka. Their abundance increased to some extent during a short periods corresponding to warm Dansgaard-Oeshger interstadials 14, 12, 8, and 2 of marine isotopic stages (MIS) 3 and 2. The first and second deglaciation phases separated by the Younger Dryas cooling episode are marked by significant abundance peaks of benthic foraminifers (an order magnitude higher than in the glacial period), although their share in community of benthic and planktonic foraminifers taken together decreases. Species typical of stable high-productivity areas gain a dominant position. A significant proportion of agglutinated species in Holocene sediments is indicative of Ca ions deficiency that accelerated dissolution of carbonate tests up to their disappearance approximately 2.5-3 ka ago.

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