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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Tubegatan Formation

Tubegatan Fm

Period:

Cretaceous

Age Interval:

Lower Cenomanian, K1, D1, C1, C1a-c, C2, C2a

Province:
SW Tajik, Central W Tajik

Type Locality and Naming

Includes in Khation Region, Darvaz District, Hisar-Zarafshan ranges, Dushanbe - west Shirkent-Luchob, Dushanbe - east Shirkent-Luchob

Synonym: Tyubegan Fm, Tyubegan horizon, тюбегатанский горизонт, Tubegatansk horizon, Tubegatan horizon, тюбегатанскому горизонту, Tegatan horizon, тюбегатанакому горизонту

Reference section:

Lithology and Thickness

In the Dushanbe region, the Tyubegan horizon (тюбегатанский горизонт) of the Lower Cenomanian is represented by dark gray clays with layers of sandstones (25-45 m).

In the South Gissar region (upstream of the Znadda, Luchob, Shirkeng rivers, etc.) the lower part of the Cenomanian (Tyubegan and Karikansay horizons) consists of greenish-gray and red-colored clays with layers of limestone up to 90-100 m in thickness.

In the Kafirnigan district, the Tubegatansk horizon (тюбеrатанокий горизонт) of the lower Cenomanian is represented by dark gray clays with layers of sandstones (25-45 m).

In the Vakhsh district, the Tubegatansk horizon of the lower Cenomanian is composed of greenish-gray, less often red-colored, sandstones and argillites, containing layers of clays (30-70 m).

In the Darvaz district, the Tubegatan horizon (тюбегатанскому горизонту) of the lower Cenomanian corresponds to the b, represented by greenish-gray clays with layers of sandstones and gravelites (45-110 m).

In the Karategin region, the Tegatan horizon (тюбегатанакому горизонту) of the lower Cenomanian corresponds to greenish-gray sandstones with marl layers (8-10 m).

Lithology Pattern:

Sandy claystone

Relationships and Distribution

Lower contact

Overlies the Shirabad Fm or the Khosretishin Fm

Upper contact

Karikansau Fm

Regional extent

Afghan-Tajik Basin; and in NE Turkestan district in the basin of the river Isfara; and Turkestan region, including the Zeravshan valley, as well as in the Zeravshan-Gissar region, Dushanbe region, South Gissar region, Kafirnigan district, Darvaz district, Vakhsh district, Karategin region.

GeoJSON

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Fossils

Age

Lower Cenomanian

Age Span:

Beginning stage:

Cenomanian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

100.50

Ending stage:

Cenomanian

Fraction up in the ending stage:

0.25

Ending date (Ma):

98.85

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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