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

Kundalyantau Formation

Kundalyantau Fm

Period:

Cretaceous

Age Interval:

Lower Aptian, B1-B3

Province:
Bukhara-SW Gissar

Type Locality and Naming

By the ridge of Kundalyangtau, Southwest Gissar. Kh.Kh. Mirkamalov, 1971 (51, p.62). Stratotype in Kundalyangtau. Middle formation in Okuzbulak Gr. Corresponds to the middle (marine) part of the Okuzbulak Fm (Okuzbulak Gr) or the lower part of the Lower Okuzbulak Formation. S.N. Simakova. (55; 415; 452).

Synonym: Kundalyangtauskaya Suite, Кундалянтауская св.

Lithology and Thickness

At the bottom - gray and dark gray clays with layers of clayey limestones; at the top - alternation of siltstone (aleurolites), clays, greenish and brownish-gray limestones.

Lithology Pattern:

Siltstone

Relationships and Distribution

Lower contact

Lies conformably on the Machay Fm

Upper contact

It is conformably overlain by the Lyalimkan Fm

Regional extent

Southwest Gissar.

GeoJSON

null

Fossils

Contains ammonites Deshayesites ex gr. antiquas Bogd.; marine bivalve mollusks - Ceratostreon vinokurovae Mirk., Exogyra trigonalis Mirk.; foraminifera - Miliammina mjatliukae Dain., M. kuznetzovae S. Mam., Gyroidinoides sokolovae (Mjatl.); ostracods Antepraijenborchella praealta turkmenica Andrv., Asciocythere parabrevis Andrv. et Oertli. and a complex of spores and pollen.

Age

Belongs to the lower Aptian, in the Strat. sl. (446) - to the Barremian.

Age Span:

Beginning stage:

Aptian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

121.40

Ending stage:

Aptian

Fraction up in the ending stage:

0.2

Ending date (Ma):

119.76

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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