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

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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)”