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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Mazarbash Formation

Mazarbash Fm

Period:

Triassic

Age Interval:

Norian-Rhaetian (T₃ n-r), M3d

Province:
SE Tajik (SE Pamir)

Type Locality and Naming

Includes in SE Murghab district (Gurdumdin type section Gurumd and Kattamardzhana rivers)

Synonym: Mazarbash suite, Мазарташская свита

Reference section:

Lithology and Thickness

It is composed of bright green, reddish at the tops, poorly sorted sandstones and siltstones with interlayers and lenses of heterogeneous conglomerates, reminiscent in appearance of the conglomerates of the Djambulak Fm. Cobbles (0.5-30 cm in diameter) are well-rounded, isometric, dumped, unsorted, entirely sandstone. Thickness is 500-1000 m.

Lithology Pattern:

Sandy_claystone

Relationships and Distribution

Lower contact

It lies, possibly transgressively, on the Ladinian-Carnian volcanics of the Kattamardzhana Fm (каттамарджанайской свиты), or is thrust over the sandstones and siltstones of the Istyk Fm (истыкской свиты).

Upper contact

The suite is overlain with apparent conformity, but with a visible erosion marks of the Lower Jurassic Darbazatazh Fm (дарбазаташской Свитой).

Regional extent

It is widespread in the basins of the rivers Gurumd and Kattamardzhana.

GeoJSON

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Fossils

Organic remains in the suite have not been found

Age

By its position in the section, it is conditionally considered Norian-Rhaetian.

Age Span:

Beginning stage:

Norian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

227.30

Ending stage:

Rhaetian

Fraction up in the ending stage:

1.0

Ending date (Ma):

201.36

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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