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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Dzhanbulak Formation

Dzhanbulak Fm

Period:

Triassic

Age Interval:

Norian-Rhaetian (T₃ n-r), M3a

Province:
SE Tajik (SE Pamir)

Type Locality and Naming

Includes in SE Murghab district (Gurdumdin type section)

Synonym: Dzhanbulak suite, джанбулакская свита, Jangbulak Fm (English spelling)

Reference section:

Lithology and Thickness

The thickness is 500-1000 m. It consists of bright green, variously pebbly conglomerates, including boulder ones, with interlayers, often lenses, of gray and greenish-gray, plagioclase-quartz, differently-grained sandstones and siltstones. The pebbles are from 0.5 to 40 cm in diameter, well-rounded, mostly isometric, in composition predominantly non-shaly, plagioclase-quartz. In addition, among the pebbles, there are albitephires, quartz-albitephires, tuffs of albitephurites, spilites, diabases, plagiogranites, plagiogranophyres, plagiogranite-porphyres, plagiolites, quartz-muscovite greisen, albitites, clay and clay-siliceous slates and siltstones.

Lithology Pattern:

Aus Conglomerate

Relationships and Distribution

Lower contact

It conformably overlies the Ladinian-Carnian Tashdzhilga Fm

Upper contact

It is overlain with erosion by the Lower Jurassic Gurumdin Fm (гурумдинской свитой).

Regional extent

It is widespread in the Southeast Pamir. Outcrops of this suite are known in the basin of the left tributaries of the Gurumdy River (the Tashdzhilga, Kuldzhilga, and Jangbulak rivers).

GeoJSON

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Fossils

Organic remains have not been found in the thickness

Age

It is conditionally referred to the Norian-Rhaetian deposits, by its position in the profile.

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.