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

Buratbulak Formation

Buratbulak Fm

Period:

Silurian

Age Interval:

middle-upper Llandovery, N8

Province:
Nuratau

Type Locality and Naming

Near the village of Buratbulak, South Nuratau Range. Yu.I. Loshkin et al. in 1965 within the middle-upper Llandovery (457, p.37, scheme 6; 441, p.92-93). Later, the age was changed to upper Llandovery (271, p.42). Due to the suite compiled by Yu.I. Loskin includes formations of different facies and ages, the term has been removed from usage.

Synonym: Buratbulakskaya Suite, Буратбулакская св.

Lithology and Thickness

According to A.A., it was subdivided into two sub-suites:

Lower - sandy-siltstone-slate, characterized by graptolites of the Llandovery and Upper - limestone-slate. Total thickness 450-500m.

Lithology Pattern:

Sandy limestone

Relationships and Distribution

Lower contact

Lower and upper contacts are tectonic (Loskin et al., 1965).

Upper contact

Lower and upper contacts are tectonic (Loskin et al., 1965).

Regional extent

Southern Nuratau Range, central part of the southern slopes of Karachatay, southeastern end of the Aktay Mountains.

GeoJSON

null

Fossils

Age

Subsequent geological survey works by K.K. Pyatkov et al. (1975), I.A. Pyanovskaya et al. (1984), R.S. Khan et al. (1989) and others have proven that the suite compiled by Yu.I. Loskin includes formations of different facies and ages: the Upper sub-suite belongs to the Upper Cambrian-Lower Middle Ordovician Kalsarin Fm and Badamchaly Fm, the Lower includes deposits of the middle part of the Upper Llandovery Nacrut Fm and the upper part of the Upper Llandovery Dzhabulak Fm.

Age Span:

Beginning stage:

Aeronian

Fraction up in beginning stage:

0.5

Beginning date (Ma):

439.54

Ending stage:

Telychian

Fraction up in the ending stage:

1.0

Ending date (Ma):

432.93

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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