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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Kokbulak Formation

Kokbulak Fm

Period:

Neoproterozoic

Age Interval:

Tonian (Rf? Sal), M1-M3d

Province:
SE Tajik (SE Pamir)

Type Locality and Naming

Includes in SE Murghab district (Mynkhadjr type), SE Murghab district (Istyk type (Dunkeldyk area), SE Murghab district (Gurdumdin type), SE Murghab district (Gurdumdin type Kastanatdjilga, Buryukurmes rivers), SE Murghab district (Gurdumdin type Shin and Igrymiyu rivers), SE Murghab district (Gurdumdin type Gurumd and Kattamardzhana rivers).

The series was distinguished in 1967 by V. I. Dronov. It is the lower formation in Otavautek Gr

Synonym: Kokbulakskaya suite

Lithology and Thickness

Slates.

Lithology Pattern:

Claystone

Relationships and Distribution

Lower contact

Schematic stratigraphic column indicates the lower contact as Zortor Fm

Upper contact

Schematic stratigraphic column indicates the upper contact as Kultchak Fm

Regional extent

It is widespread in the Southeast Pamir.

GeoJSON

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Fossils

Age

Tonian

Age Span:

Beginning stage:

Tonian

Fraction up in beginning stage:

0.3

Beginning date (Ma):

916.00

Ending stage:

Tonian

Fraction up in the ending stage:

0.5

Ending date (Ma):

860.00

Depositional setting

Depositional pattern:

Additional Information

The questions regarding the position of the described deposits in the geological section of the Southern Pamir, their age, stratification, and the possibility of considering them in the rank of "series" require further research.

Compiler:

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