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

Karatag Formation

Karatag Fm

Period:

Carboniferous

Age Interval:

Serpukhovian, B2

Province:
South Gissar

Type Locality and Naming

Along the Karyatag River, southern slope of the Gissar ridge. S.K. Ovchinnikov in 1941 (382, p. 73). Stratotype on the watershed of the Karatag-Shirkent and Shirkent-Obizarang rivers.

Synonym: Karatag Suite, Каратаская св.

Lithology and Thickness

Basaltic lavas and tuffs with rare horizons and lenses of limestones and jaspers. Thickness 800-1200 m.

Lithology Pattern:

Lava

Relationships and Distribution

Lower contact

Contacts with underlying formations are not established

Upper contact

In the territory of Tajikistan, it is overlain by the Suffin-Carb Fm. Along Z.A. Yudalevich, F.K. Divaev, and others, it is overlain with apparent conformity by the Sagdor Fm.

Regional extent

South slope of the Gissar Range.

GeoJSON

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Fossils

In limestones, at the top of the suite - Serpukhovian Goniatites - Stenoglaphyrites sp., Cravenoceras sp.; conodonts - Gnathodus bilineatus bilineatus (Roun.), G. bilineatus bollandensis Hig. et Bouck., Paragnathodus commutatus Bran. et Mehl.; late Visean-Serpukhovian sea lilies - Arenariocrinus arenarius Yelt. et Schew., Pentagonocyclicus djyjykrutus Schew. and others.

Age

It is an age equivalent of the Vakhshvar Fm. S.K. Ovchinnikov attributed the suite to the Middle Carboniferous; O.N. Nikitina and others (1993) - to the Lower-Middle Carboniferous; in the Stratigraphic Lexicon (439) - to the Middle Visean (?) Serpukhovian stage; in the monograph (165) and on the State Geological Map-500 of Uzbekistan (460) - to the Early Carboniferous Late Visean-Serpukhovian age.

Age Span:

Beginning stage:

Serpukhovian

Fraction up in beginning stage:

0.25

Beginning date (Ma):

328.61

Ending stage:

Serpukhovian

Fraction up in the ending stage:

1.0

Ending date (Ma):

323.40

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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