Tokubay Formation

Tokubay Fm

Period:

Cretaceous

Age Interval:

Lower-Upper Cretaceous (upper Albian- lower Cenomanian), F9d

Province:
Fergana

Type Locality and Naming

Named after Tokubai-Ata Mountain (Togbai-Ata), South-Eastern Fergana. A.V. Sochava, 1963 (288, p.1148). Middle formation in Changet Gr. Stratotype not specified

Synonym: Tokubai Suite, Токубайская св., Kuvassay Suite, Upper Changet Suite. L.B. Rukhina (390).

Lithology and Thickness

Red, pink sandstones with interlayers of clays, gravels, marls, and limestones. Thickness 100-350m.

Lithology Pattern:

Sandy limestone

Relationships and Distribution

Lower contact

Lies conformably on the Klaudzin Fm or Apsyr Fm

Upper contact

It is conformably overlain by the Budali Fm

Regional extent

South-Eastern Fergana, Naucat Basin. Enters the Changet Gr. Corresponds to the upper part of the Changet Gr, S.N. Simakov. (416; 417; 433).

GeoJSON

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Fossils

Contains freshwater bivalve mollusks Plicatotrigonioides simakovi Mart., Pseudohyria cardiformis ferganensis Mart., P. mongolensis Mart.; ostracods - Cypridea kleinbergi Gal., C. turitschini Lüb., C. cavernosa Gal.

Age

Belongs to the upper Albian - lower Cenomanian; Along M.M. Aliyev et al. (56), - to the upper Albian; in (452) - to the Albian - lower Cenomanian.

Age Span:

Beginning stage:

Albian

Fraction up in beginning stage:

0.8

Beginning date (Ma):

103.04

Ending stage:

Cenomanian

Fraction up in the ending stage:

0.4

Ending date (Ma):

97.86

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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