Aksagatin Formation

Aksagatin Fm

Period:

Cretaceous

Age Interval:

Campanian-Maastrichtian, CK2, CK5a, CK8, CK9

Province:
Chatkal-Kuramin Region

Type Locality and Naming

Along the Aksagata River, Chatkal ridge. I.M. Abdazimova, E.M. Shvetsova, 1988 (26, pp.67-68). Stratotype in the area of the village of Gidjal, on the left bank of the Aksagata River.

Synonym: Aksagatinian Suite, Аксагатинская св.

Lithology and Thickness

Lagoonal-continental formations with thin, sporadic marine layers - red mottled clays, gray sandstones, gravelites, and limestones. Thickness 5-110m.

Lithology Pattern:

Continental marl

Relationships and Distribution

Lower contact

Unconformably overlies the Syuksok Fm

Upper contact

is transgressively overlain by the Paleogene.

Regional extent

Submontane areas of the Chatkal, Karjantaus, and Kuramin ridges. Aksagatin Fm - analogue of the Darbaza Fm and Temirchin Fm of the Prishashkent Chulei, Tashkent depression, and Nichkesay Fm of the NE and S. Fergana.

GeoJSON

null

Fossils

Marine layers contain marine bivalve mollusks - Arca tenuistriata Münst., Ostrea tecticosta turkmenica Born., Septifer (?) ahaaralensis Pojar.; lagoonal-continental charophyte algae - Mongolichara costulata Kyansep-Rom., M. gobica (Karcs. et Liemb.-Tiv.) Karcs. et Kyansep-Rom., Mesochara stankevitchii Kyansep-Rom. and others.

Age

Belongs to the Campanian - Maastrichtian.

Age Span:

Beginning stage:

Campanian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

83.65

Ending stage:

Maastrichtian

Fraction up in the ending stage:

1.0

Ending date (Ma):

66.04

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)”