Middle Jurassic stratigraphy in the southwestern part of the Republic of Tatarstan

被引：6

作者：

Mitta, V. V. ^{[1
]}

Kostyleva, V. V. ^{[2
]}

Glinskikh, L. A. ^{[3
]}

Shurygin, B. N. ^{[3
]}

Starodubtseva, I. A. ^{[4
]}

机构：

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

[2] Russian Acad Sci, Inst Geol, Moscow V71, Russia

[3] Russian Acad Sci, Siberian Branch, Trofimuk Inst Petr Geol & Geophys, Novosibirsk, Russia

[4] Russian Acad Sci, Vernadsky State Geol Museum, Moscow, Russia

来源：

STRATIGRAPHY AND GEOLOGICAL CORRELATION | 2014年 / 22卷 / 01期

关键词：

Ulyanovsk area of the Volga region; ammonites; bivalves; foraminifers; ostracodes; Bajocian; Callovian; stratigraphy; sedimentology;

D O I：

10.1134/S0869593814010043

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

Data on the structure of the Middle Jurassic marine deposits in the vicinity of Ulyanovsk (sections of the Tarkhanovskaya Pristan-Dolinovka profile) are generalized with due regard for ammonites, bivalves, and microfossils occurring in sediments. Outcrops of the Tarkhanovskaya Pristan site represent the northernmost Bajocian section of the Russian Platform, where ammonites of Tethyan origin are identified. As is established, the pre-Callovian sand-clay sequence formerly attributed to the Bathonian includes the Garantiana beds of the upper Bajocian in its middle part. The multidisciplinary biostratigraphic-sedimentological research showed that downwarping of the Ulyanovsk-Saratov basin and origin of the Simbirsk Bay of the Tethyan marginal sea commenced in the Bajocian Age. The identified fossils of the upper Bajocian and lower and upper Callovian are cited in paleontological plates of this work.

引用

页码：28 / 43

页数：16

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