Yamantash Fm
Period:
Neogene
Age Interval:
Langhian (N1?), E-Psh1
Province:
East Tajik (East Pamir)
Type Locality and Naming
Includes in East Pshart. It is distinguished in 1967 by V.I. Dronev, recently studied by I.A. Gusev (1972).
Synonym: Yamantash suite, Яманташская свита
Reference section:
Lithology and Thickness
It is formed by greenish-gray and reddish various gravelly, often boulder and block conglomerates and sedimentary breccias. Thickness 50-150 m.
Lithology Pattern:
Aus Conglomerate
Relationships and Distribution
Lower contact
Conformably underlying on Buguchin Fm
Upper contact
Conformably overlying on South Akbaytal Fm
Regional extent
It is widespread in the Central Pamir in the basins of the Western and Eastern Pshart rivers, Buguchidzhilga, and others.
GeoJSON
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Fossils
Age
Considering these data and the similarity of the described species in color and largely in composition to the Buldzhuansky Fm of southwestern Tajikistan, the characterized species can be tentatively attributed to the Miocene. It is not excluded that they indeed correspond in age only to the Buldzhuansky suite and are lower Miocene. N. A. Gusev (1972) for the first time referred these species to the Miocene, previously they were considered Paleogene.
Age Span:
Beginning stage:
Langhian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
15.99
Ending stage:
Langhian
Fraction up in the ending stage:
1.0
Ending date (Ma):
13.82
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Extracted from Baratov, R. B. (1976). Subdivisions of stratified and intrusive rocks of Tajikistan. Donish, Dushanbe, 276.