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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Wrang Formation

Wrang Fm

Period:

Archean

Age Interval:

Mesoarchean (AR? vt), Sh1

Province:
SE Tajik (SW Pamir)

Type Locality and Naming

Includes in Shadarlan and Schugnan ranges.

Delineated by B. Ya. Khorova and K. T. Budanova (1965). Within the volumes accepted in this work, these suites were delineated in 1957-1970 by V. P. Bulin, K. T. Budanova, G. S. Volos, and A. G. Davydchenko during geological mapping. In somewhat different volumes, and sometimes under different names, these suites or those close to them were previously delineated by S. I. Klunnikov, V. A. Maslennikov, and M. I. Rabkin (Geol. USSR, vol. 24, 1959; Barhatov, 1963). This is the upper formation in Shakhdaryn Gr

Synonym: Wrang suite

Reference section:

Lithology and Thickness

It is composed of garnet-biotite, amphibole-biotite, and biotite gneisses, as well as calcite and dolomite marbles with a total thickness of 1300-1500 m.

The Wrang suite is distinguished by an abundance of layers of light marbles up to 100 m thick, so S.I. Klunnikov (1935 a) distinguished it as "white-marble." However, in some areas, for example, in the northeastern end of the Wakhan Ridge and in the basin of the Drumdara River, the number of marbles sharply decreases.

Lithology Pattern:

Gneiss

Relationships and Distribution

Lower contact

The schematic stratigraphic column indicates the conformable lower contact as Darshay Fm

Upper contact

The schematic stratigraphic column indicates the conformable upper contact as Drumdara Fm

Regional extent

It is widespread in the Southwest Pamir.

GeoJSON

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Fossils

Age

Mesoarchean

Age Span:

Beginning stage:

Mesoarchean

Fraction up in beginning stage:

0.0

Beginning date (Ma):

3,200.00

Ending stage:

Mesoarchean

Fraction up in the ending stage:

1.0

Ending date (Ma):

2,800.00

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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