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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Agadzhan Formation

Agadzhan Fm

Period:

Triassic

Age Interval:

Olenekian-Anisian (T_1-2), E-Psh3

Province:
East Tajik (East Pamir)

Type Locality and Naming

Includes in East Pshart (Agadjan river basin)

Synonym: Agadzhan layer, Agadjan layer, Agadjan Fm

Reference section:

Lithology and Thickness

It is composed of dark gray clay slates with beds and layers of dark cherts and greenstone-altered fissured basic volcanogenic rocks. (100-500 m)

Lithology Pattern:

Volcanic_ash

Relationships and Distribution

Lower contact

The layer lies with an unclear contact on the faunistically characterized sediments of the Kuberkandinsky horizons, Shiberdzhilgin Fm

Upper contact

It is overlain by the faunistically characterized Middle-Upper Triassic Gumbekol Fm in conformity.

Regional extent

It is developed in the watershed part of the eastern half of the Pshart Range, on the periphery of the exits of the Middle-Upper Triassic Gumbekol Fm (гумбезкольской толщи).

GeoJSON

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Fossils

No organic remains have been found in either the Nychkedyilgin or Agadzhan Fms.

Age

They are conditionally referred to the Lower-Middle Triassic, by their position in the section, above the Upper Permian and below the Middle-Upper Triassic sediments.

Age Span:

Beginning stage:

Olenekian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

249.88

Ending stage:

Anisian

Fraction up in the ending stage:

1.0

Ending date (Ma):

241.46

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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