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

Myshikkol Formation

Myshikkol Fm

Period:

Carboniferous

Age Interval:

Lower Bashkirian, CK9, CK9b

Province:
Chatkal-Kuramin Region

Type Locality and Naming

Along the river Myshikkol, Altyntopkan Mountains, Kuramin Ridge. I.M. Bogomolny and others in 1967.

Synonym: Myshikkolskaya Suite, Мышиккольская св.

Lithology and Thickness

Limestones, interbedded with siliceous slates, siltstone (aleurolites), sandstones, tuff-sandstones, tuff-argillites, tuffs of andesite-dacite composition. Laterally, the composition of the suite and the character of interbedding are variable. Thickness from 70 to 400 m.

Lithology Pattern:

Limestone

Relationships and Distribution

Lower contact

Conformably overlies the Tashgezek Fm

Upper contact

Unconformably overlain by the effusives of the Upper Paleozoic.

Regional extent

Kuramin Ridge, 3. Karamazar, rivers Myshikkol, Koshmulla, Yangikan, Beguly, Almabulak, Chashly

GeoJSON

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Fossils

Contains conodonts - Declinognathodus noduliferus (El. et Gr.), Neognathodus symmetricus Lane; brachiopods - Productus cf. concinus Sow., Echinoconchus punctatus (Mart.).

Age

Middle Carboniferous (Lower Bashkirian)

Age Span:

Beginning stage:

Bashkirian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

323.40

Ending stage:

Bashkirian

Fraction up in the ending stage:

0.4

Ending date (Ma):

320.10

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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