Karasagyr Formation

Karasagyr Fm

Period:

Cretaceous

Age Interval:

Santonian, K10

Province:
Kyzylkum Region

Type Locality and Naming

Along the Karasagyr uplift, Nurata Mountains. I.M. Abdazimova, 1998 (165, p.146), used the name proposed by G.V. Taraborin in 1963 for the Karasagyr Mountains. Stratotype on the Karasagyr uplift.

Synonym: Karasagyr Suite, Карасагырская св.

Lithology and Thickness

Variegated cross-bedded coarse-grained sands, sandstones, gravelites, conglomerates with layers of siltstone (aleurolites) and clays. The suite is characterized by layers of intraformational conglomerates, wood fragments, vertebrate bones. Thickness 46-110m.

Lithology Pattern:

Coarse-grained sandstone

Relationships and Distribution

Lower contact

It lies with erosion on the Tohumbet Fm and transgressively on the Paleozoic

Upper contact

It is overlain with erosion by the Karakatin Fm.

Regional extent

Southwestern end of the South Nuratau ridge (foothills of the Aktau, Karatau, etc. mountains).

GeoJSON

null

Fossils

Age

It is conditionally attributed to the Santonian.

Age Span:

Beginning stage:

Santonian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

85.70

Ending stage:

Santonian

Fraction up in the ending stage:

1.0

Ending date (Ma):

83.65

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)”