Bissektin Formation

Bissektin Fm

Period:

Cretaceous

Age Interval:

upper Turonian-Coniacian, K1-K3

Province:
Kyzylkum Region

Type Locality and Naming

Along the Bissekty station, Bukantau Mountains, Central Kyzylkum. L.A. Nessov, 1990 (326, pp. 59-62).

Synonym: Bisektinskaya Suite, Bisseky in McCann, Биссектинская св.

Lithology and Thickness

Gray-yellow sandstones with interlayers of conglomerates and black-brown gravels. Thickness 20-100m.

Lithology Pattern:

Coarse-grained sandstone

Relationships and Distribution

Lower contact

Lies with erosion on the Kendyktyube Fm

Upper contact

It is overlain with erosion by the Aytym Fm.

Regional extent

Correlated with the Zhirkendek suite of the S.-E. Aral region.

GeoJSON

null

Fossils

Contains marine bivalve mollusks - Megatrigonia syrdariensis (Arkh.); dinosaur bone remains - Ankylosanridae, Hadrosauridae, Deinodatidae, Carnosauria; turtle scutes Trionyx sp.; fish vertebrae - Aidachar paludalis Ness.; shark teeth - Scapanorohynchus sp., Eostriatolamia sp., Hispidaspis sp.; plant remains - Icacinoxylon antiquum Chud., Cupressinoxylon jamanjarsaense Chud., Thujaxylon ljngiradiatum Chud., Taxodiaxylon sp.

Age

Belongs to the upper Turonian-Coniacian.

Age Span:

Beginning stage:

Turonian

Fraction up in beginning stage:

0.85

Beginning date (Ma):

90.07

Ending stage:

Coniacian

Fraction up in the ending stage:

1.0

Ending date (Ma):

85.70

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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