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

Tabakbulak Formation

Tabakbulak Fm

Period:

Carboniferous

Age Interval:

upper Tournaisian, N3a

Province:
Nuratau

Type Locality and Naming

Along the Tabakbulak kolkhoz, N. Nuratau Ridge. P.N. Podkopaev et al. in 1961 (460, p. 155). Stratotype - Tabakbulak kolkhoz area.

Synonym: Tabakbulakskaya Formation, Табакбулакская св.

Lithology and Thickness

Light gray, massive, biogenic, stromatolitic, biosparitic limestones. Thickness about 250 m.

Lithology Pattern:

Reef limestone

Relationships and Distribution

Lower contact

The contact with the underlying deposits of the Semizsalyapin sub-suite (Semizalpin Fm) is conformable

Upper contact

The upper boundary is unknown.

Regional extent

Northern foothills of the S. Nuratau Ridge, marginal part of the northeastern slope of the central part of the Pistalitau Ridge. It is correlated with the "Walsortian" or "Sargardonian" organogenic structures of the Chatkal-Kuramin region.

GeoJSON

null

Fossils

Contains conodonts - Neopolygnathus kylosjensis (Nigm.), Gnathodus typicus Coop., Dollymae bouckaerti Groes. and others; brachiopods - Palaeochoristites čatkalicus Dik.

Age

In the stratigraphy scheme of the Carboniferous of Central Asia (1961), Tournaisian stage, upper sub-stage; N.M. Mikhno et al. in 1978 attributed it to the upper Tournaisian; V.P. Vashchenko et al. (1980f.); N.V. Cherkashenko et al. (1983f.); V.S. Korsakov et al. (1993f.); R.R. Usmanov et al. (1999f.); on the State GeolMap-500 of Uzbekistan (460) - to the upper Tournaisian.

Age Span:

Beginning stage:

Tournaisian

Fraction up in beginning stage:

0.5

Beginning date (Ma):

353.02

Ending stage:

Tournaisian

Fraction up in the ending stage:

1.0

Ending date (Ma):

346.73

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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