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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Gezan Formation

Gezan Fm

Period:

Cretaceous

Age Interval:

Upper Turonian (K₂¹), S4

Province:
North Tajik

Type Locality and Naming

Synonym: Cenomanian and Turonian Stages, Dasgirak and Muzrabat Horizons

Reference section:

Lithology and Thickness

It is composed of interbedded colorful clays, siltstones and gravelites with a thickness of 35-45 m in the Turkestan region and 12-34 m in the Zeravshan-Gissar region.

Lithology Pattern:

Siltstone

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

Dasgirak and Muzrabat Horizons (Upper Turonian) are widespread in the Turkestan, Zarafshan-Gissar, Dushanbe, Kafirnigan, Vakhsh, Zerafshan, and Darvaz districts.

GeoJSON

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Fossils

In the lower part of the suite, remains of Fatina (Costeina) costei (Coq.), Ostrea vatonnei Thomas et Peron have been found.

Age

Upper Turonian

Age Span:

Beginning stage:

Turonian

Fraction up in beginning stage:

0.5

Beginning date (Ma):

91.65

Ending stage:

Turonian

Fraction up in the ending stage:

1.0

Ending date (Ma):

89.39

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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