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

Select Region(s) to search
Hold Ctrl (Windows/Linux) or Command (Mac) to select multiple

Bardarin Formation

Bardarin Fm

Period:

Triassic

Age Interval:

Province:
SE Tajik (SE Pamir)

Type Locality and Naming

It was distinguished in 1949 by B.P. Barhatov. It is part of the Rushan complex (see the description of the Carboniferous? Raumid Fm раумидской свиты).

Synonym: Bardarinskaya Suite, 'Бардаринская свита

Reference section:

Lithology and Thickness

It is composed of dark-colored, distinctly layered, feldspar-quartz, variably grained sandstones, siltstones, clay and carbonaceous slates, which predominantly include in the lower part of the suite section beds, packages, and lenses of basic greenstone-altered volcanic rocks, sometimes in combination with limestones. Quartz gravels are also often encountered. The incomplete thickness is 1500 m.

Lithology Pattern:

Sandy_claystone

Relationships and Distribution

Lower contact

It lies with an unclear contact above the Permian? Shuvdarin Fm

Upper contact

overlying strata are not established.

Regional extent

It is widespread in the Rushan Ridge.

GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[71.6,37.74],[71.88,37.81],[72.04,37.88],[72.29,37.89],[72.51,37.85],[72.81,37.85],[73,37.83],[73.14,37.78],[73.43,37.67],[73.52,37.51],[73.04,37.44],[72.59,37.47],[72.06,37.4],[71.9,37.43],[71.56,37.39],[71.56,37.71],[71.6,37.74]]]]}}

Fossils

Besides poorly preserved crinoids, no identifiable organic remains have been found in the suite.

Age

It is conditionally attributed to the Triassic period, based on its position in the section. The age of the suite is controversial. When distinguishing it, B.P. Barhatov dated it to the early Paleozoic. V.I. Dranov (1963) based on the finds of Permian fauna in the layer underlying the Bardarin Fm on the divide of the Uedniv-Chadegiv rivers, considered it to be Permian. B.K. Kushlin (1964) by its position in the section and by comparing it with terrigenous-siliceous rocks of the Sayan mountains of Echkitushar on the Eastern Pamir, from which he distinguished Triassic radiolarians (determined by D.M. Chedia), considers the Bardarin Fm to be Triassic. However, in V.I. Dranov's opinion, the mentioned radiolarians were found in rocks from the tectonic foliation zone and have nothing to do with the Bardarin Fm. In the Pshart Ridge, in deposits previously (Kushlin, 1964) attributed to the Bardarin Fm, in 1967-1968, V.I. Dranov collected a complex of the Kubergetdin-Pamir microfauna (see the description of the Kubergetdin Pamir). Of the Russian horizons, the Mumudzhilkinskaya and Shiberdzhilkinskaya layers. The question of the age of the Bardarin Fm requires further study.

Age Span:

Beginning stage:

Induan

Fraction up in beginning stage:

0.0

Beginning date (Ma):

251.90

Ending stage:

Carnian

Fraction up in the ending stage:

1.0

Ending date (Ma):

227.30

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.