Vanch-Yazgulem Gr

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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Vanch-Yazgulem Gr

Period:

Proterozoic

Age Interval:

Tonian – Ediacaran (Rf? jz), V1

Province:
SE Tajik (Central W Pamir)

Type Locality and Naming

For the first time, the series is distinguished, until now it was considered as the Vanch-Yazgulemsky "complex" (Barhatov, 1963, and others), which, however, contradicts the rules of stratigraphic nomenclature. P.P. Chuenko identified three formations in the Vanch-Yazgulem Gr, they are in accordance with each other (Geol. USSR, vol. 24, 1959). Their independence has been verified by geological mapping. In addition to this scheme, used in the present work, about 15 different schemes of division of the Vanch-Yazgulemskaya series were proposed. By V.I. Popov, G.L. Yudin, N.K. Morozenko, A.P. Niedzwetsky, I.K. Nikitin, A.I. Zakharchenko, N.A. Kuzmin, S.N. Venediktov, M.Kh. Khamidov, this series was divided into several formations - from 3 to 10 in different points. However, they turned out to be not traceable over the entire area of the Vanch-Yazgulem Gr.

Synonym: Vanch-Yazgulemskaya Series, Ванч-язгулемская серия

Reference section:

Lithology and Thickness

P.P. Chuenko identified three formations in the Vanch-Yazgulem Gr, they are in accordance with each other (Geol. USSR, vol. 24, 1959). They are Barnavadzh Fm (Барнаваджская свита), Yazgulem Fm (Язrулемская свита), and Djamakska Fm (Джамакская свита)

Lithology Pattern:

Sandy_claystone

Relationships and Distribution

Lower contact

Djamak Fm

Upper contact

Zorabat Fm

Regional extent

It is widespread in the western part of the Central Pamir.

GeoJSON

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Fossils

Age

Tonian – Ediacaran

Age Span:

Beginning stage:

Tonian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

1,000.00

Ending stage:

Ediacaran

Fraction up in the ending stage:

1.0

Ending date (Ma):

538.80

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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