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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Fortambek Formation

Fortambek Fm

Period:

Carboniferous

Age Interval:

Tournaisian (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: Fortambek suite, Фортамбекская свита

Reference section:

Lithology and Thickness

Initiating the Sauksay Gr, it is composed of acidic, intermediate, and basic volcanics with a thickness of over 2000 m.

Lithology Pattern:

Volcanics

Relationships and Distribution

Lower contact

Not defined.

Upper contact

Conformably overlying Devlokhansk Fm

Regional extent

They are distributed in the Muxuy, Lakhsh district.

GeoJSON

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Fossils

Age

Tournaisian

Age Span:

Beginning stage:

Tournaisian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

359.30

Ending stage:

Tournaisian

Fraction up in the ending stage:

1.0

Ending date (Ma):

346.73

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.