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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Obiharinsk Formation

Obiharinsk Fm

Period:

Carboniferous

Age Interval:

Middle-Upper Visean (C₁ t+v), C3

Province:
Central Tajik

Type Locality and Naming

The listed suite was identified by I. V. Pyzyanov and A. Kh. Qafarsky (Pyzyanov, 1965). This is the uppermost formation of Sauksay Gr.

Lakhsh (formerly Jirgatol) District — officially renamed in 2016 — is located in northeast Tajikistan, and includes the village of Mugh (formerly Muk) within its administrative jamoat Lakhshi Bolo (Wikipedia, 2025; RFE/RL via Asia-Plus, 2016; Wikipedia: Mugh; Wikipedia: Lakhshi Bolo).

Synonym: Obiharekskaya suite, обихарекская свиты

Reference section:

Lithology and Thickness

It is formed by black and dark gray sandstones and clay shales with a thickness of 800 m. I. V. Pyzyanov and A. Kh. Kafarsky distinguished these suites throughout the development area of the Sauksay Gr.

According to I. V. Pyzyanov (1965), the upper barren sandstones and shales (Obiharinsk Fm) (обихарекская свита) are likely Serpukhovian.

Lithology Pattern:

Sandy_claystone

Relationships and Distribution

Lower contact

conformably lying on the Devlokhansk Fm

Upper contact

Sauksay Gr

Regional extent

They are distributed in the Muxuy, Lakhsh district.

GeoJSON

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Fossils

Age

Visean. According to I. V. Pyzyanov (1965), the upper barren sandstones and shales (Obiharinsk Fm) (обихарекская свита) are likely Serpukhovian. But represented within the Sauksay Gr for schematic stratigraphic column purpose.

Age Span:

Beginning stage:

Visean

Fraction up in beginning stage:

0.5

Beginning date (Ma):

338.54

Ending stage:

Visean

Fraction up in the ending stage:

1.0

Ending date (Ma):

330.34

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.