Cenozoic

Cretaceous

Jurassic

Triassic

Permian

Carboniferous

Devonian

Silurian

Ordovician

Cambrian

Neoproterozoic

Main source = Baratov, R.B., et al. (1976). Subdivisions of stratified and intrusive rocks of Tajikistan. Publishing House "Donish", Dushanbe, 269 pp. plus tables. Provided by Dr. Jovid Aminov, Nazarbayev University, Astana, Kazakhstan Translated to English by the GeoGPT group, Zhejiang Lab, Hangzhou, China--see About

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Baigashkin Formation

Baigashkin Fm

Period:

Permian

Age Interval:

Upper Permian (P₂ m), Ka1

Province:
NE corner Tajik

Type Locality and Naming

It is distinguished in 1968 by E.F. Romanenko and E.S. Chernykh.

Synonym: Baigashkinskaya suite, Байrашкинская свита

Reference section:

Lithology and Thickness

It is formed by reddish and green conglomerates, sandstones, and clay slates of incomplete thickness of 150 m. In the lower part of the suite, there are interlayers of detrital limestones. The fragments in the conglomerates are represented by quartz and limestones.

Lithology Pattern:

Aus Conglomerate

Relationships and Distribution

Lower contact

The Baigashkin Fm conformably overlies the Kommunar Fm

Upper contact

Overlying deposits, older than Quaternary, are unknown.

Regional extent

It is widespread in the Karakulsky district, in the Kommunarsky and Zulumart ranges. E.Ya. Levin (1967) compares the Baigashkin Fm with a package of gray clay slates exposed in the mouth part of the Zulumart river, where foraminifera of the Pamir horizon (see fossils below) were found, and on this basis, he refers the Baigashkin Fm to the Pamir horizon.

GeoJSON

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Fossils

In the detrital limestones, fusulinids of the Murgab horizon Neoschwagerina sp., Nankinella orientalis K. M.--Maclay, N. aff. waageni Schw. are occasionally found.

Age

Upper Permian

Age Span:

Beginning stage:

Changhsingian

Fraction up in beginning stage:

0.5

Beginning date (Ma):

253.07

Ending stage:

Changhsingian

Fraction up in the ending stage:

1.0

Ending date (Ma):

251.90

Depositional setting

Depositional pattern:

Additional Information

Compiler:

Extracted from Baratov, R. B. (1976). Subdivisions of stratified and intrusive rocks of Tajikistan. Donish, Lakhsh district, 276.