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

Snegirin Formation

Snegirin Fm

Period:

Carboniferous

Age Interval:

Serpukhovian - Bashkirian (C v₂-m₁), C1, C1a, C1b, C1c

Province:
Central W Tajik

Type Locality and Naming

Includes in Hisar-Zarafshan ranges, and Obisafit, Turkparidin, Chakykalya typesections. It is distinguished and detailed by V. D. Saltovskaya (1965; 1966; 1974).

Synonym: Snegirin suite, снежнинская свита

Reference section:

Lithology and Thickness

It is formed by characteristic thin-bedded limestones with nodules, lenses, and interlayers of black cherts. The thickness is 70-100 m.

Lithology Pattern:

Limestone

Relationships and Distribution

Lower contact

Upper contact

The rocks of the Snegirin Fm are overlain with erosion by the Bachauldin Fm deposits.

Regional extent

They are widespread in the Turkestan, Zarafshan-Gissar, and Karategin regions.

GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[67.98,38.93],[67.84,38.93],[67.75,39],[67.69,39.14],[67.95,39.18],[68.65,39.29],[70.55,39.46],[70.71,39.43],[70.66,39.23],[70.01,38.98],[69.39,38.86],[68.77,38.75],[68,38.7],[67.98,38.93]]]]}}

Fossils

It contains a complex of foraminifera and brachiopods of the Namurian(Serpukhovian) - base of the Bashkirian stages Eostaffella pseudostruvei Raus. et Bel., Pseudostaffella antiqua (Dutk.), Ps. proozawai Kir., Spirifer bisulcatus Sow.

Age

From the fossil data, it is represented Serpukhovian - Bashkirian for schematic stratigraphic purpose.

Age Span:

Beginning stage:

Serpukhovian

Fraction up in beginning stage:

0.5

Beginning date (Ma):

326.87

Ending stage:

Bashkirian

Fraction up in the ending stage:

0.4

Ending date (Ma):

320.10

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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