Tolubay Formation

Tolubay Fm

Period:

Carboniferous

Age Interval:

Middle Carboniferous (Moscovian), F10b

Province:
Fergana

Type Locality and Naming

Along the Tolubay area, Chauvay ore deposit, South Fergana. G.S. Porshnyakov, G.A. Yarushinsky in 1956 (176, p.24). Stratotype on the right bank of the Chauvay River.

Synonym: Tolubai Suite, Толубайская св.

Lithology and Thickness

Complex interbedding of sandstones, siltstone (aleurolites), clayey, carbonaceous-clayey, siliceous and calcareous shales, limestones, gravelites, conglomerates. In some places at the base of the mountain (thickness. 10-70m) conglomerates. Thickness is up to 100-400 to 1000 m.

Lithology Pattern:

Clayey sandstone

Relationships and Distribution

Lower contact

Lies with erosion or in a continuous section on the rocks of the Andygen Gr - Kauzan Fm and, less often, Shyut Fm

Upper contact

Overlying unknown.

Regional extent

South Fergana, northern foothills of the Alai Range.

GeoJSON

null

Fossils

Contains early-late Moscovian foraminifers - Aljutovella aljutovica Raus., Profusulinella convoluta Lee et Chen, Fusulina cylindrica Fisch. et Moell., Fusulinella ex gr. mjachkovensis Raus. and others.

Age

Moscovian epoch, often includes Lower Moscovian deposits. (165; 439; 459).

Age Span:

Beginning stage:

Moscovian

Fraction up in beginning stage:

0.1

Beginning date (Ma):

314.34

Ending stage:

Moscovian

Fraction up in the ending stage:

0.3

Ending date (Ma):

312.71

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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