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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Daralitau Formation

Daralitau 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: Daralitau horizon

Lithology and Thickness

In the Vakhsh area, the upper Campanian (Daraletau horizon) is light gray clayey limestones with a thickness of 60-160 m. In the Kafirnigan area, it is composed of gray clays with Lopha (Arctostrea) falcata (Mort.), overlain by sandy limestones (at the base, strongly glauconitic, locally turning into sandstones); the thickness of the upper Campanian deposits in the Kafirnigan area on the southern part of the Babatag ridge reaches 80-90 m.

Lithology Pattern:

Clayey limestone

Relationships and Distribution

Lower contact

Overlies the claystones of the Sarykamysh Fm.

Upper contact

Underlies the dolomitic limestone of the Udantau 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, it contains interlayers of shell limestones and sandy clays. Here, Lopha (Arctostrea) falcata (Mort.) has been found. In the Kafirnigan area, Lopha (Arctostrea) falcata (Mort.), plus remains of sea urchins Conulus magnificus Orb., Catopygus fenestratus Agassis, Echinocorys ovatus Leske; bivalves Inoceramus cf. balticus Boehm., Chlamys dujardini (Roem.), Gryphaea vesicularis (Lam.); ammonites Hoplitoplacenticeras marroti (Coq.), Trachyscaphites pulcherrimus (Roem.) and others.

Age

Upper Campanian

Age Span:

Beginning stage:

Campanian

Fraction up in beginning stage:

0.5

Beginning date (Ma):

77.91

Ending stage:

Campanian

Fraction up in the ending stage:

1.0

Ending date (Ma):

72.17

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.