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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Sarykamysh Formation

Sarykamysh Fm

Period:

Cretaceous

Age Interval:

Upper Turonian (K₂¹), K1, D1, C2, C2a, S3, S4, S5

Province:
SW Tajik, North Tajik, Central W Tajik

Type Locality and Naming

Includes in Khation Region, Sughd Region, Darvaz district, Dushanbe - west Shirkent-Luchob, Dushanbe - east Shirkent-Luchob.

Synonym: Sarykamysh horizon

Lithology and Thickness

The lower Campanian (Sarykamysh horizon) is represented in the Vakhsh area by dark gray clays with a thickness of 60-90 m. In the Kafirnigan area, the Sarykamysh horizon consists of greenish-gray clays with a thickness of 10-50 m, containing interlayers of limestones and oolites with a characteristic complex of oysters.

Lithology Pattern:

Claystone

Relationships and Distribution

Lower contact

Overlies the Kattakamysh Fm.

Upper contact

Overlain by the clayey limestone of the Daralitau Fm.

Regional extent

Afghan-Tajik Basin. In the Kafirnigan area, the most complete and most faunistically characterized sections of the Campanian stage are known. They are located in the southern part of the Babatag ridge.

GeoJSON

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Fossils

In the Vakhsh area, interlayers of shell limestones with oyster Liostrea prima Rom. In the Kafirnigan area, oysters include Liostrea prima (Rom.), L. acutirostris (Nils.), Fatina (Costeina) akkaptschigensis Bobkova, Ceratostreon spinosum (Math.).

Age

Lower Campanian

Age Span:

Beginning stage:

Campanian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

83.65

Ending stage:

Campanian

Fraction up in the ending stage:

0.5

Ending date (Ma):

77.91

Depositional setting

Depositional pattern:

Additional Information

Compiler:

Chapman, J.B., et al. (9 co-authors), 2020. The Afghan-Tajik Basin: A composite record of sedimentary basin evolution in response to tectonics in the Pamir. Basin Research, 32(3), 525-545. https:/doi.org/10.1111/bre.12381.

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