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

Kuhistan Formation

Kuhistan Fm

Period:

Cretaceous

Age Interval:

upper Cenomanian - lower Turonian, Z1

Province:
Zarafshan-N.Gissar

Type Locality and Naming

From the historical name of Central Tajikistan. M.R. Dzhalilov, Yu.N. Andreev, F.Kh. Hakimov et al., 1971 (191, pp.74-75). Stratotype in the area of the village of Ravat on the right bank of the Yagnob River.

Synonym: Kuhistan Suite, Хушикатская св.

Lithology and Thickness

Green and dark gray clays with interlayers of sandstones and shell limestones. Thickness 48-100m.

Lithology Pattern:

Sandy_claystone

Relationships and Distribution

Lower contact

Conformably overlies the Sangrezin Fm

Upper contact

Conformably overlain by the Gezan Fm

Regional extent

Zarafshan Ridge (Mukhbel), North Central Gissar.

GeoJSON

null

Fossils

Contains marine bivalve mollusks - Nucula gaurdakensis Bobk., Gyrostrea turkestanensis (Born.), Korobkovitrigoonia darwaseana Rom., Cyprimeria faba Sow.; foraminifers Brotzenella berthelini (Kell.), Hedbergella tschikrysovi (Arap.).

Age

Belongs to the upper Cenomanian - lower Turonian. (56; 446; 452).

Age Span:

Beginning stage:

Cenomanian

Fraction up in beginning stage:

0.7

Beginning date (Ma):

95.88

Ending stage:

Turonian

Fraction up in the ending stage:

0.3

Ending date (Ma):

92.55

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)”