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

Karakuz Formation

Karakuz Fm

Period:

Cretaceous

Age Interval:

upper Aptian-lower Albian, B1a, B2,

Province:
Bukhara-SW Gissar

Type Locality and Naming

Named after the village of Karakuz, Babatag Range, valley of the Kafirnigan River. V.N. Shvanov, 1961 (504, p.74). Stratotype at the village of Babatag. Belongs to the Karakuz Horizon (55; 191; 362; 363; 383; 446; 452).

Synonym: Karakuz Suite, Каракузская св.

Lithology and Thickness

At the bottom, gray and brown sandstones, conglomerates, siltstone (aleurolites) with layers of limestones.

At the top - dark gray, green clays with layers of light gray sandstones, shell rocks, and gravelites. Thickness 40-150m.

Lithology Pattern:

Sandy_claystone

Relationships and Distribution

Lower contact

Conformably overlies the Derbent Fm [But entry for Derbent says it conformably overlies Karkuz; which also fits the ages of each], with erosion on the Aksu Fm and Gelandaryin Fm.

Upper contact

It is overlain [overlies; according to ages] conformably or with erosion by the Mingbatman Fm, with erosion by the Kyzylangur Fm.

Regional extent

Babatag Range, S., Central, and N.-E. Gissar. Correlated with the Kul'kamys Fm and Charsangin Fm.

GeoJSON

null

Fossils

At the bottom, layers of limestones with ammonites - Acanthohoplites nolani Seun. At the top, with ammonites Hypacanthoplites jacobi Coll., H. aschiltaensis Anth., H. tscharlokensis Glasun.; marine bivalve mollusks - Linotrigonia archiaci Orb., L. Spinosa Park.; ostracods - Dolocythere ex gr. rara Martins., Stravia prosocialis Mand.

Age

Belongs to the upper Aptian - lower Albian.

Age Span:

Beginning stage:

Albian

Fraction up in beginning stage:

0.7

Beginning date (Ma):

104.31

Ending stage:

Albian

Fraction up in the ending stage:

0.1

Ending date (Ma):

111.93

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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