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

Shirabad Formation

Shirabad Fm

Period:

Cretaceous

Age Interval:

upper Albian, B1-B3

Province:
Bukhara-SW Gissar

Type Locality and Naming

Along the village of Shirabad, South-Western Gissar. Yu.N. Andreyev, 1966 (366, p.44, fig.7). Stratotype in the Kelif-Shirabad ridge, 6 km south-west of the village of Shirabad. It is included in the Shirabad mountain (55; 318; 446; 452). Lowermost formation in Tarkapantigay Gr.

Synonym: Shirabad Suite, Ширабадская св.

Lithology and Thickness

Limestones, grey and greenish-grey sandstones with layers of clays, in the middle part - layers of gypsum and red clays. Thickness 20-60 m.

Lithology Pattern:

Clayey limestone

Relationships and Distribution

Lower contact

It conformably overlies the Akkaptchigay Fm and Jetymtau Fm (Dzhetyimtau Fm)

Upper contact

It is conformably overlain by the Tyubegatan Fm and Chorrokh Fm.

Regional extent

South-Western, Central, North-Western Gissar, Babatag range, Bukhara-Karshinsky region. The Sh. suite, in the understanding of S.N. Simakov (313), corresponds to the Okuzbulak Fm plus Kaligrek Fm (taken together). In the Strat. Sl. (446) it is not recommended for use in such a span.

GeoJSON

null

Fossils

Contains ammonites - Karamaiceras kolbajensis Sok., marine bivalves - Rhynchostreon pseudoconicum (Bobk.), Korobkovitrigonia korobkovi Sav., gastropods - Nerineoptyxis amudariensis Pčel., Actaeonella praesupernata Dzhal., foraminifers - Ammobaculoides explanatus Mam., Trochammina kugitangensis N. Byk.; ostracods - Asciocythere dorsoangulata Andrv., Schuleridea jonesiana ventrobullae Mand.

Age

It belongs to the upper Albian, Along X.X. Mirkamalov (51; 300), - to the Cenomanian.

Age Span:

Beginning stage:

Albian

Fraction up in beginning stage:

0.8

Beginning date (Ma):

103.04

Ending stage:

Albian

Fraction up in the ending stage:

1.0

Ending date (Ma):

100.50

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)”