Cenozoic

Cretaceous

Jurassic

Triassic

Permian

Carboniferous

Devonian

Silurian

Ordovician

Cambrian

Neoproterozoic

Main source = Baratov, R.B., et al. (1976). Subdivisions of stratified and intrusive rocks of Tajikistan. Publishing House "Donish", Dushanbe, 269 pp. plus tables. Provided by Dr. Jovid Aminov, Nazarbayev University, Astana, Kazakhstan Translated to English by the GeoGPT group, Zhejiang Lab, Hangzhou, China--see About

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Hajirbulak Formation

Hajirbulak Fm

Period:

Carboniferous

Age Interval:

Upper Serpukhovian (C_lhd), C2, C2a

Province:
Central W Tajik

Type Locality and Naming

Includes in Dushanbe-west Shirkent-Luchob, east Shirkent-Luchob. It was identified in 1941 by E. M. Golovin (Bensch, 1969).

Synonym: Hajirbulakskaya Suite, Хаджирбулакская свита

Reference section:

Lithology and Thickness

It consists of greenstone spilites, diabases, and their tuffs, containing lenses of limestones, siltstones, sandstones. The incomplete thickness is 200 m, and beyond the republic, the thickness of the suite reaches 1000 m.

Lithology Pattern:

Volcanic_ash

Relationships and Distribution

Lower contact

The bottoms of the suite in the valley of the Luchob River are not exposed; in the southwestern spurs of the Gissar, it conformably lies on the Middle Visean

Upper contact

The Hajirbulak Fm (Хаджирбулакокая Свита) is overlain conformably by the Lower Bashkirian Suffin Fm (суффинской свитой).

Regional extent

It is developed in the Dushanbe region on a small area in the valley of the Luchob River.

GeoJSON

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Fossils

Outside the territory of Tajikistan, in the Hajirbulak suite, F.R. Bensh (1969) found remains of Upper Namurian (Serpukhovian) Goniatites and foraminifera.

Age

Age Span:

Beginning stage:

Serpukhovian

Fraction up in beginning stage:

0.7

Beginning date (Ma):

325.48

Ending stage:

Serpukhovian

Fraction up in the ending stage:

1.0

Ending date (Ma):

323.40

Depositional setting

Depositional pattern:

Additional Information

Compiler:

Extracted from Baratov, R. B. (1976). Subdivisions of stratified and intrusive rocks of Tajikistan. Donish, Dushanbe, 276.