Neogene

Paleogene

Cretaceous

Jurassic

Triassic

Permian

Carboniferous

Devonian

Silurian

Ordovician

Cambrian

Neoproterozoic

Mesoproterozoic

Paleoproterozoic

Main source = Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian) Translated to English by the GeoGPT group, Zhejiang Lab, Hangzhou, China--see About

Snezhin Formation

Snezhin Fm

Period:

Carboniferous

Age Interval:

Upper Serpukhovian-Lower Bashkirian, Z2

Province:
Zarafshan-N.Gissar

Type Locality and Naming

Along the Snejny Creek, Gissar Range. V.D. Saltovskaya, 1969 (403, p. 45). Stratotype along the Snejny Creek - right tributary of the Kara-Kul River.

Synonym: Snezhninskaya Suite, Снежинская св.

Lithology and Thickness

Thin-bedded limestones with nodules, lenses, and interlayers of black flint. Thickness 70-100 m.

Lithology Pattern:

Siliceous limestone

Relationships and Distribution

Lower contact

Conformably overlies the Sangalt Fm

Upper contact

Overlain with erosion by the Bachauldin Fm (with Bukhara; under Gissar N&S).

Regional extent

In the form of separate strips in the southern part of the Chakylkalyan-North Gissar region on the northern slope of the Gissar Range.

GeoJSON

null

Fossils

Contains foraminifers - Eostaffella cf. postmosquensis Kir., E. ludmilae Raus., E. varvariensis Brazhn. et Pot., Neoarchaediscus subbaschkiricus (Reitl.), N. postrugosus (Reitl.); brachiopods - Striatifera aff. prima Serg., Spirifer bisulcatus Son., Eomarginifera schartimeensis Jan.; conodonts - Declinognathodus lateralis (Hig. et Boučk.), D. cf. noduliferus (El. et Grav.) and others; foraminifers Eostaffella pseudostruvei Raus. et Bel., Pseudostaffella antiqua Dutk. and others.

Age

Belongs to the upper part of the Serpukhovian stage of the Lower Carboniferous - Lower Bashkirian substage of the Middle Carboniferous. (165; 439; 460).

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:

0.5

Ending date (Ma):

319.28

Depositional setting

Depositional pattern:

Additional Information

Compiler:

– In: GeoGPT translation of: “Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian)”