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

Beglyar Formation

Beglyar Fm

Period:

Cretaceous

Age Interval:

Middle-Upper Aptian, B1

Province:
Bukhara-SW Gissar

Type Locality and Naming

Along the Belyar kol, Kugitangtau ridge, T.N. Bogdanova, 1986 (452, p.305). Stratotype on the western wing of the Kugitang anticline, 3 km to the northwest of the Kugitang settlement, 3 km to the southeast of the Belyar kol. The stratigraphic name is not used on the territory of Uzbekistan. Lower formation in Kamprek Gr

Synonym: Beglyar Suite, Беглярская св.

Lithology and Thickness

Massive, cross-bedded, coarse-grained sandstones with layers of conglomerates, siltstone (aleurolites), and clays, with limestone layers in the upper part. Thickness 35-75m

Lithology Pattern:

Coarse-grained sandstone

Relationships and Distribution

Lower contact

It lies with erosion on the Kaligrek Fm

Upper contact

Schematic stratigraphic column indicates the upper contact as Kulkamysh Fm

Regional extent

Southwest Gissar. The upper part of the formation, probably, is analogous to the Kulkamysh Fm

GeoJSON

null

Fossils

Contains ammonites - Acanthohoplites ex gr. nolani Seun., A. bigoureti Seun., A. lorioli Sinz.; marine bivalve mollusks - Actostreon latissimum (Lam.), Liostrea leymerii Desh. and others.

Age

It belongs to the Middle-Upper Aptian.

Age Span:

Beginning stage:

Aptian

Fraction up in beginning stage:

0.6

Beginning date (Ma):

116.48

Ending stage:

Aptian

Fraction up in the ending stage:

0.7

Ending date (Ma):

115.66

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)”