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

Shurasan Formation

Shurasan Fm

Period:

Neogene

Age Interval:

Upper Pliocene, B1a

Province:
Bukhara-SW Gissar

Type Locality and Naming

Along the Shurasan anticline, foothills of the Gissar Range. G. Yu. Alferov et al., 1969.

Synonym: Shurasan Suite,

Lithology and Thickness

Unevenly alternating alluvial-proluvial brown-colored conglomerates, gravelites, sandstones, siltstone (aleurolites). Up to 1400 m.

Lithology Pattern:

Coarse-grained sandstone

Relationships and Distribution

Lower contact

With erosion lies on the Sulusay Fm and Paleogene

Upper contact

With erosion overlain by the Ammagan Fm.

Regional extent

Northern foothills of the Gissar Range, interfluve of the Tanhyzdarya and Kyzyl-Darya, Kashkadarya depression. Correlated with the Uchkolsay Fm in the southwestern Gissar. Correlated with the Kassantau Fm, Uchkolsay Fm, and Khodzhalychin Fm (144)

GeoJSON

null

Fossils

Contains ostracods - Ilyocypris ex gr. manasensis Mand., I. koktalensis Bodina., I. sp., Eucypris grandis Bodina., E. sp., Limnocythere depressa Schn., L. aff. botaschica Gr. in litt., L. ex gr. misera Mand., Candona merita Bodina, Candoniella albicans Br., Cyprinotus ex gr. arasensis Bodina., Mediocypris sp.

Age

A.A. attributed to the middle-late Miocene. According to B.I. Pinhasov, forms the lower part of the brown-colored molasse formation of the Upper Tien Shan series. Age in the Pliocene.

Age Span:

Beginning stage:

Piacenzian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

3.60

Ending stage:

Piacenzian

Fraction up in the ending stage:

0.5

Ending date (Ma):

3.09

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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