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

Korumbay Formation

Korumbay Fm

Period:

Devonian

Age Interval:

Givetian, N1

Province:
Nuratau

Type Locality and Naming

By the Korumbay collective farm, Shokhetau Mountains, N. Nuratau Range. R.R. Usmanov et al. in 1993 (Korsakov et al., 1993f.). Stratotype in the area of the Korumbay collective farm, Shokhetau Mountains.

Synonym: Korumbayskaya Suite, Корумбайская св.

Lithology and Thickness

Predominantly dark to black limestones, less often light, sometimes reddish, variegated, less often dolomites, locally with clayey, ferruginous admixture. In the W. part of Shokhetau, limestones are strongly dolomitized. Thickness 300-350m.

Lithology Pattern:

Dolomitic limestone

Relationships and Distribution

Lower contact

Conformably increases the section of the Tyulkin Fm

Upper contact

Upper boundary unknown.

Regional extent

Northern Nuratau Range, Shokhetau Mountains. Coeval with Shirgalan Fm?

GeoJSON

null

Fossils

Contains amphiporoids - Amphipora ramosa Phill., A. ramosiensis Bog. and others, brachiopods - Stringocephalus burtini Defr., indicating the Givetian age of the sv. (460).

Age

Middle Devonian - Givetian

Age Span:

Beginning stage:

Givetian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

385.30

Ending stage:

Givetian

Fraction up in the ending stage:

1.0

Ending date (Ma):

378.90

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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)”