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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Nematsdarin Formation

Nematsdarin Fm

Period:

Carboniferous

Age Interval:

Gzhelian (C? nm), Sh1

Province:
SE Tajik (SW Pamir)

Type Locality and Naming

Includes in Shadarlan and Schugnan ranges. It was identified in 1968 by V.P. Bulin and G.V. Kuznetsov.

Synonym: Nematsdarinskaya suite, Немацдаринская свита

Reference section:

Lithology and Thickness

It consists of metamorphosed gray quartz-chlorite schists and quartzitic sandstones containing interlayers of marbleized limestones. The incomplete thickness is 600 m.

Lithology Pattern:

Sandy limestone

Relationships and Distribution

Lower contact

In other cases, it has tectonic contacts with the surrounding rocks.

Upper contact

Regional extent

It is distributed in the South-West Pamir on small areas. The formation, in most cases, occurs in the form of remnants of the roof of the Shugnan intrusive complex, belonging to the Lower Cretaceous Pamir-Shugnan complex.

GeoJSON

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Fossils

In the slates exposed on Peak Terboy and at the mouth of the Vardhidz River, which G.V. Kuznetsov attributes to the Nematsdarin Fm (немацдаринской свите), single Carboniferous spores Zonotriletes suberenatus Waltz., Z. crassiptaris Waltz., Lepidozonotriletes latispinus Lib., Trematozonotriletes irregularis (Andr.) Jsch. (determinations of I.A. Siversova) were found.

Age

To date, it has been studied very poorly. On this basis, the Nematsdarin Fm is conditionally attributed to the Carboniferous.

Age Span:

Beginning stage:

Gzhelian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

303.68

Ending stage:

Gzhelian

Fraction up in the ending stage:

1.0

Ending date (Ma):

298.89

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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