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

Charhansay Formation

Charhansay Fm

Period:

Devonian

Age Interval:

Middle Devonian (?) (lower part), N8

Province:
Nuratau

Type Locality and Naming

Along the stream Charhansay, northern slope of the Bakhiltau Mountains, South Nuratau Range. S.K. Piven', I.A. Kim et al., 1976f. Stratotype on the right bank of the Charhansay stream. Middle formation of the Aktau Gr.

Synonym: Charhansay Suite, Чархансайская св.

Lithology and Thickness

Interbedding of banded gray marbled limestones, sometimes brecciated and crinoidal, with layers, lenses, and nodules of cherts and marbled dolomites with tremolite. Thickness 620m.

Lithology Pattern:

Siliceous limestone

Relationships and Distribution

Lower contact

Contacts with underlying deposits are everywhere disturbed. Schematic stratigraphic column indicates the lower contact as Angidan Fm

Upper contact

Contacts with overlying deposits are everywhere disturbed. Schematic stratigraphic column indicates the upper contact as Bakhiltau Fm

Regional extent

South Nuratau Range, northern slope of the Bakhiltau Mountains, Kyzyl, Aktau, city of Takhku.

GeoJSON

null

Fossils

Contains tabulates - Favosites sp. ind., Squameofavosites sp. ind., Crassialveolites sp. ind., widespread in the Lower and Middle Devonian.

Age

A.A. tentatively attributes the suite to the lower and middle Devonian.

Age Span:

Beginning stage:

Emsian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

410.51

Ending stage:

Emsian

Fraction up in the ending stage:

1.0

Ending date (Ma):

394.30

Depositional setting

Depositional pattern:

Additional Information

Compiler:

A.I. Kim – In: GeoGPT translation of: “Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian)”