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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Mynkhadzhir Formation

Mynkhadzhir Fm

Period:

Jurassic

Age Interval:

Sinemurian – lower Aalenian (Jh-a), M1

Province:
SE Tajik (SE Pamir)

Type Locality and Naming

It is distinguished in SE Murghab district, Mynkhadzhir type section

Synonym: Mynkhadzhirskaya suite, Мынхаджирская свита

Reference section:

Lithology and Thickness

It is composed of dark, coarse- and giant-bedded limestones and dolomites. Thickness 40-110 m.

Lithology Pattern:

Dolomitic limestone

Relationships and Distribution

Lower contact

Schematic stratigraphic column indicates lower contact as Kyzylbelays Fm

Upper contact

The upper age boundary is determined by the conformable lying of the Upper Aalenian-Lower Bajocian Jarutek Fm (джарутекской свиты) on it.

Regional extent

It is widespread in the Southeast Pamir.

GeoJSON

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Fossils

Organic remains are found only in the Mynkhadzhir Fm. In its lower layers, Hettangian-Sinemurian pelecypods Plagiostoma cf. compressa Terq. have been encountered, in the upper layers - Toarcian-Oxfordian pectinids Camptonectes lens Sow., Entolium demissum Phill.

Age

Sinemurian – lower Aalenian

Age Span:

Beginning stage:

Sinemurian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

199.46

Ending stage:

Aalenian

Fraction up in the ending stage:

0.8

Ending date (Ma):

171.66

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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