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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Ushbin Formation

Ushbin 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: Ushbinskaya suite, Ушбинская свита

Reference section:

Lithology and Thickness

It is composed of light massive reef limestones of 1200 m thickness. They contain lenses of dark layered detrital limestones, sandstones, gravelites, and conglomerates.

Lithology Pattern:

Reef limestone

Relationships and Distribution

Lower contact

It conformably overlies the Karadzhilgin Fm, which belongs to the Karachatyrsko-Kubergandinsky horizons.

Upper contact

It is conformably overlain by the Kommunar Fm.

Regional extent

It is widespread in the Karakulsky district, in the Kommunarsky and Zulumart ranges.

GeoJSON

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Fossils

Throughout the section of the Ushbin Fm, remains of fusulinids of the Murgab horizon Kahlerina sp., Verbeekina verbeeki (Gein.), Neoschwagerina sp., Pseudodoliolina cf. ozawai Yabe et Hanz. were found.

Age

Upper Permian

Age Span:

Beginning stage:

Wuchiapingian

Fraction up in beginning stage:

0.2

Beginning date (Ma):

258.49

Ending stage:

Wuchiapingian

Fraction up in the ending stage:

0.8

Ending date (Ma):

255.30

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.