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

Tamchisay Formation

Tamchisay Fm

Period:

Carboniferous

Age Interval:

Upper Moscovian, N5, N5a

Province:
Nuratau

Type Locality and Naming

Along the Tamchi River, Malguzar Mountains. Z.S.Rumyantseva, 1972 (166, p.291-292); 1973 (387, p. 79).

Synonym: Tamchisay Suite, Тамчисайская св.

Lithology and Thickness

Dark gray sandstones, interbedded with claystones (argillites), graphitic argillaceous slates containing thin layers of limestones, calcareous siltstone (aleurolites), and sandy detrital limestones. The terrigenous formations are associated with a boulder hill composed of fragments and large boulders of dark gray, gray, and light gray limestones with Silurian tabulates. Thickness 500 m.

Lithology Pattern:

Sandy limestone

Relationships and Distribution

Lower contact

Schematic stratigraphic column indicates the lower contact as Baras Beds Fm

Upper contact

According to I.M.Nigmadzhanov, the upper contact is unclear.

Regional extent

Extends as a broad, latitudinally trending belt along the northern slope of the Malguzar Mountains.

GeoJSON

null

Fossils

In the limestone layers, foraminifera of the Middle Carboniferous type - Profusulinella sp., Eofusulina (?) sp.; in the lower part of the section, conodonts - Idiognathodus delicatulus Gun., I. podolskensis Gor., Streptognathodus parvusDunn., Gondolella sp., determining the age of the suite as late Moscovian Middle Carboniferous (165).

Age

In the Strat. Sl. (439) it is assigned to the lower Moscovian substage.

Age Span:

Beginning stage:

Moscovian

Fraction up in beginning stage:

0.3

Beginning date (Ma):

312.71

Ending stage:

Moscovian

Fraction up in the ending stage:

0.6

Ending date (Ma):

310.27

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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