Neogene

Paleogene

Cretaceous

Jurassic

Triassic

Permian

Carboniferous

Devonian

Silurian

Ordovician

Cambrian

Neoproterozoic

Mesoproterozoic

Paleoproterozoic

Main source = Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian) Translated to English by the GeoGPT group, Zhejiang Lab, Hangzhou, China--see About

Akkapchigay Formation

Akkapchigay Fm

Period:

Cretaceous

Age Interval:

upper Albian, B1-B3

Province:
Bukhara-SW Gissar

Type Locality and Naming

Along Akkapchigai Gorge, Southwest Gissar. Y.N. Andreyev, 1966 (366, p.44). Stratotype in Akkapchigai Gorge - in the northern part of the Kelif-Shirabad Ridge. Included in the Akkapchigai Horizon (55; 383; 446; 452). Uppermost formation in the Kamprek Gr

Synonym: Akkapchigai Suite, Аккапчигайская св.

Lithology and Thickness

Dark and greenish-gray clays with thin (0.1-0.4) interlayers of shell limestones. Up to 30-135m.

Lithology Pattern:

Shallow-marine marl

Relationships and Distribution

Lower contact

Lies conformably on the Luchak Fm

Upper contact

Overlain conformably by the Shirabad Fm.

Regional extent

S.-W., S. Gissar, Babatag Ridge, Bukhara-Karshinsky region.

GeoJSON

null

Fossils

Contains ammonites - Mortoniceras inflata gibbosa Spath., Hysteroceras carinatum Orb., Semenovites michalskii Sem.; marine bivalve mollusks - Echodus luppovi Mirk., Linotrigonia danovi Sav., Korobkovitrigonia korobkovi Sav., gastropods - Haustator kamprekensis Dzhal.; brachiopods - Sellithyris crassa Arch.; foraminifers - Evolutinella dechkanabadensis (Zhuk.), Ammobaculoides explanatus Mam.; ostracods - Cythereis rugosa Mand., Asciocythere dorsoangulata Andrv.

Age

Belongs to the upper Albian.

Age Span:

Beginning stage:

Albian

Fraction up in beginning stage:

0.45

Beginning date (Ma):

107.49

Ending stage:

Albian

Fraction up in the ending stage:

0.8

Ending date (Ma):

103.04

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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