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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Devlokhansk Formation

Devlokhansk Fm

Period:

Carboniferous

Age Interval:

Lower-Middle 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 middle 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: Devlokhansk suite, девлоханакая свита

Reference section:

Lithology and Thickness

It is represented by limestones with lenses of volcanics (1000 m).

Lithology Pattern:

Limestone

Relationships and Distribution

Lower contact

Conformably underlying Fortambek Fm

Upper contact

Conformably overlying Obiharinsk Fm

Regional extent

They are distributed in the Muxuy, Lakhsh district.

GeoJSON

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Fossils

In the middle, limestone part of the section of Sauksay Gr, in the Devlokhansk Fm, (девлоханская свита), late Turonian rugose corals Cyathoclisia multiseptatum Gorsky, Siphonophyllia cylindrica Scoul.; brachiopods Spirifer ex gr. tornacensis Kon., and slightly higher, a rich complex of Visean corals Lithostrotion irregulare Phill., L. junceum Flem., Diphyphyllum vermiculare Stuck., Palaeosmilia murschisoni Edw. et Haime, Syringopora cf. reticulata (Goldf.) and others were found.

Age

Lower-Middle Visean.

Age Span:

Beginning stage:

Visean

Fraction up in beginning stage:

0.0

Beginning date (Ma):

346.73

Ending stage:

Visean

Fraction up in the ending stage:

0.5

Ending date (Ma):

338.54

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.