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

Ishkap Beds Formation

Ishkap Beds Fm

Period:

Silurian

Age Interval:

Late Wenlock, N2

Province:
Nuratau

Type Locality and Naming

Along the Ishkap ridge, southern slope of Mount Dzhalpak, N. Nuratau ridge. I.A. Kim, S.K. Piven, O.B. Ivanova, 1987 (165, p.48). They form the lower part of the Khatinbulak Fm.

Synonym: Ishkapskie Sloi, Ишкапские сл.

Lithology and Thickness

Crinoidal, stromatolitic massive and indistinctly wavy-bedded limestones, thickness 30m.

Lithology Pattern:

Reef limestone

Relationships and Distribution

Lower contact

The lower boundary is unclear

Upper contact

Stratigraphically higher are the Abartkan Beds Fm.

Regional extent

Northern Nuratau ridge, Merishkorskaya structure, Ishkap ridge, left and right banks of the middle course of the Abaratkan River, northern roadside road between the villages of Chashma-Zrak and the ruins of the village of Shaly.

GeoJSON

null

Fossils

Contains brachiopods - Gypidula incipiens Barr., Atrypinella pseudogranulifera Miz., Atrypa reticularis Linn.

Age

Age is early Silurian, late Wenlock

Age Span:

Beginning stage:

Homerian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

430.62

Ending stage:

Homerian

Fraction up in the ending stage:

0.5

Ending date (Ma):

428.68

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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