Neogene

Paleogene

Cretaceous

Jurassic

Triassic

Permian

Carboniferous

Devonian

Silurian

Ordovician

Cambrian

Neoproterozoic

Mesoproterozoic

Paleoproterozoic

Main source = Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian) Translated to English by the GeoGPT group, Zhejiang Lab, Hangzhou, China--see About

Besragatin Formation

Besragatin Fm

Period:

Carboniferous

Age Interval:

Tournaisian, N1

Province:
Nuratau

Type Locality and Naming

Along the Besragata stream, Shokhetau Mountains, North Nuratau Range, R.R. Usmanov, Korsakov et al. in 1993 (460, p. 153) identified as a suite. Formations were first described by Sh.Sh. Sabdyushev in 1975.

Synonym: Besragatin Suite, Бесрагатинская св.

Lithology and Thickness

According to the data of R.R. Usmanov et al. (1999), dark to black thin-bedded limestones, often dolomitic, and dolomites. In the lower part - a horizon (5-10m) of bituminous limestone with streaks and concretions of black flint. Thickness about 300 m.

Lithology Pattern:

Dolomitic limestone

Relationships and Distribution

Lower contact

The lower boundary is unclear

Upper contact

The upper - normally stratigraphic with limestones of the Chambil Fm.

Regional extent

North Nuratau Range, Shokhetau Mountains.

GeoJSON

null

Fossils

Contains brachiopods - Palaeochoristites sp., P. aff. desinuatus Lis.; foraminifers - Archaeosphaera minima Sul., Parathurammina sp., Glomospiranella sp., Endothyra sp., Paradajnella sp., Palaeospiroplectammina cf. tchernyshinensis (Lip.), characteristic of Tournaisian deposits.

Age

The age is dated to the Tournaisian period of the Early Carboniferous epoch.

Age Span:

Beginning stage:

Tournaisian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

359.30

Ending stage:

Tournaisian

Fraction up in the ending stage:

1.0

Ending date (Ma):

346.73

Depositional setting

Depositional pattern:

Additional Information

Compiler:

V.S. Korsakov, R.R. Usmanov – In: GeoGPT translation of: “Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian)”