Changet Gr

Period:

Cretaceous

Age Interval:

Barremian-Cenomanian, F9d

Province:
Fergana

Type Locality and Naming

Along the Changet River, East Fergana. D.I. Mushketov, 1928 (319, p.185). Initially distinguished under the name "red t."

Synonym: Changet Series, Чангетская сер.

Lithology and Thickness

Reddish sandstones and clays with subordinate layers of greenish-gray clays, siltstone (aleurolites), sandstones, in the lower part gravelites and conglomerates. Thickness about 1000 m. Subdivided by by A.V. Sochava (434) - into the Oytalin, Chalmin, Kokyar, Klaudzin, Tokubay, Budali, and Gulchin Fms. by the decision of the 1971 conference (383) - into the Khodzhayabad (Chalmin), Khodzhaosman (Kokyar), Kloudzin, and Tokubay Fms. (100; 115; 318; 445; 458). N.N. Bobkova". Strat. sect. (446). Subdivided by A.E. Dovzhikov into the Tulek and Kurshab Fms; by S.N. Simakov (416) into the Lower and Upper Changet Fms; by L.B. Rukhin (390) - into Lower, Middle, and Upper Changet deposits

Lithology Pattern:

Sandy_claystone

Relationships and Distribution

Lower contact

Lies unconformably on the Paleozoic and Jurassic

Upper contact

It is overlain with erosion by the Charvak-Cret Fm.

Regional extent

E., N. Fergana.

GeoJSON

null

Fossils

Age

Belongs to the Lower Cretaceous – Cenomanian

Age Span:

Beginning stage:

Barremian

Fraction up in beginning stage:

0.75

Beginning date (Ma):

122.68

Ending stage:

Cenomanian

Fraction up in the ending stage:

0.7

Ending date (Ma):

95.88

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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