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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Madm Formation

Madm Fm

Period:

Permian

Age Interval:

Lower Permian, S2

Province:
North Tajik

Type Locality and Naming

Synonym: Madmskaya Suite, Мадмскаясвита свитa

Reference section:

Lithology and Thickness

Conglomerates. It consists of red polymictic conglomerates, containing lenses and interlayers of gravels, sandstones. The incomplete thickness is 500 m. In the debris of conglomerates, various sedimentary rocks of the Paleozoic are contained: siliceous and carbonate rocks, gravels, conglomerates, clay slates, quartzites; as well as various intrusive rocks, close to granitoids of middle and late Carboniferous Turkistan and Severnovorzob complexes: plagio-granites, muscovite and biotite granites, porphyroid granites, quartz diorites, quartz syenites, quartz porphyries, etc. There are also rootless blocks of carbonate rocks of the Ordovician, Silurian, Devonian and lower Carboniferous periods (Shadshinov, 1970).

Lithology Pattern:

Aus Conglomerate

Relationships and Distribution

Lower contact

On the older rocks, the Madmskaya Suite lies with an angular discordance.

Upper contact

The covering deposits are unknown.

Regional extent

It is widespread in the southern part of the Turkestan region in the upper reaches of the Zeravshan River.

GeoJSON

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Fossils

Organic remains have not been found in it.

Age

A.S. Shadshinov (1970) and D.A. Starshinin attributed the Madmskaya Suite to the Upper Carboniferous - Lower Permian based on broad stratigraphic correlations. We conditionally consider this suite to be Lower Permian, taking into account its similarity in composition and stratigraphic position to the Lower Permian Kumbelskaya suite, as well as the fact that the more ancient Obizarskaya suite, which has a completely different composition and genesis, is attributed to the Upper Carboniferous at its top. The assumption of the Early Permian age of the Madmskaya suite is confirmed by the presence of granite clasts, close to Middle-Late Carboniferous.

Age Span:

Beginning stage:

Artinskian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

290.51

Ending stage:

Artinskian

Fraction up in the ending stage:

1.0

Ending date (Ma):

283.30

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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