Late pleistocene-holocene ostracod assemblages of the Northern Caspian Sea shelf

被引：8

作者：

Chekhovskaya, M. P. ^{[1
]}

Stepanova, A. Yu. ^{[2
]}

Khusid, T. A. ^{[1
]}

Matul, A. S. ^{[1
]}

Rakowski, A. Z. ^{[3
]}

机构：

[1] Russian Acad Sci, Shirshov Inst Oceanol, Moscow, Russia

[2] Russian Acad Sci, Borisyak Paleontol Inst, Moscow, Russia

[3] Univ Kiel, Kiel, Germany

来源：

OCEANOLOGY | 2014年 / 54卷 / 02期

关键词：

MARGINAL MARINE ENVIRONMENTS; SEDIMENTS; BRACKISH;

D O I：

10.1134/S0001437014020040

中图分类号：

P7 [海洋学];

学科分类号：

0707 ;

摘要：

Analysis of the ostracod assemblages and the distribution of benthic foraminifera Ammonia beccarii in the core section GS 194-08-1 recovered at a depth of 7.5 m near the Volga delta front showed changes in environmental conditions in response to sea-level fluctuations. The pre-Novocaspian ostracod assemblage reflects the conditions that were dominant during the Late Khvalynian transgression, with a depth of about 20-30 m, and a salinity range of 12-13aEuro degrees. The Early Novocaspian sediments contain an ostracod assemblage that represents a deeper water environment compared to the present, with an inferred depth of 12-16 m. The faunas from the younger Novocaspian sediments with abundant monospecific populations of Cyprideis torosa and co-occurring benthic foraminifera Ammonia beccarii represent modern-like environmental conditions.

引用

页码：212 / 221

页数：10

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