Iskinaukat-Cret Formation

Iskinaukat-Cret Fm

Period:

Cretaceous

Age Interval:

Lower Cretaceous (middle-upper Albian), F9, F9e

Province:
Fergana

Type Locality and Naming

Along the village of Iski-Naukat, Fergana. A.V. Sochava, 1965 (434, p.24). The stratotype is not specified.

Synonym: Iskinaukat Suite, Искинаукатская св., Previously called the Naukat suite

Lithology and Thickness

White, pink dolomites, marls, limestones with layers of gray, bluish-gray, and red clays. Thickness 14-30m.

Lithology Pattern:

Dolomitic limestone

Relationships and Distribution

Lower contact

Lies conformably on the Aravan Fm

Upper contact

It is conformably overlain by the Apshir Fm

Regional extent

Naukat and Karavan-Kokjar depressions, South-East Fergana. S.N. Simakov correlated it with the lower part of the Muyun (Guzan) Fm of Fergana and attributed it to the Cenomanian. It is considered as the lower sub-suite of the Lyakan Fm (416).

GeoJSON

null

Fossils

Contains freshwater gastropods - Bithynia kuvasaica Zharn.; ostracods - Cypridea kleinbergi Gal., C. ferganensis Gal., C. turitschivi Lbb.

Age

Belongs to the upper + middle Albian.

Age Span:

Beginning stage:

Albian

Fraction up in beginning stage:

0.4

Beginning date (Ma):

108.12

Ending stage:

Albian

Fraction up in the ending stage:

0.7

Ending date (Ma):

104.31

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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