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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Khujistsan Formation

Khujistsan Fm

Period:

Cretaceous

Age Interval:

Lower Turonian - Upper Cenomanian (K₂¹), S4

Province:
North Tajik

Type Locality and Naming

Synonym: Khujistsanskaya suite, кухистнская сюtта, Gazdagansky and Talhabsky horizons

Reference section:

Lithology and Thickness

It consists of dark gray clays with layers of limestones. Its thickness is 17-30 m in the Turkestan region and 15-65 m in the Zeravshan-Gissar region.

Lithology Pattern:

Clayey limestone

Relationships and Distribution

Lower contact

Described deposits conformably overlie the Lower Cretaceous formations or lie with a sharp angular unconformity on the Paleozoic.

Upper contact

They are covered by the Coniacian-Maastrichtian layer.

Regional extent

The Upper Cenomanian and Lower Turonian (Gazdagansky and Talhabsky horizons) correspond to the Khujistsan Fm кухистнская сюtта. It is widespread in Turkestan region, including the Zeravshan valley, as well as in the Zeravshan-Gissar region.

GeoJSON

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Fossils

In it, Gaudryina asiatica N. Bykova, Korobkovitrigonia darwaseana (Rom.), Cyprimeria faba Sow., etc., have been found.

Age

Lower Turonian - Upper Cenomanian

Age Span:

Beginning stage:

Cenomanian

Fraction up in beginning stage:

0.8

Beginning date (Ma):

95.22

Ending stage:

Turonian

Fraction up in the ending stage:

0.5

Ending date (Ma):

91.65

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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