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

Dzyush Beds Formation

Dzyush Beds Fm

Period:

Silurian

Age Interval:

Ludlow, N2

Province:
Nuratau

Type Locality and Naming

Along the village of Dzhyush, southern slope of the N. Nuratau ridge. S.K. Piven, I.A. Kim, 1980 (165, p. 48). Stratotype located on the watershed between the Abartkan and Ishkap streams.

Synonym: Dzhyush Layers, Дзюшские сл., Dzhus Slates, Dzhus Beds

Lithology and Thickness

Frequently interbedded siltstones and calcareous sandstones. Thickness: 40 m.

Lithology Pattern:

Clayey sandstone

Relationships and Distribution

Lower contact

Along the bedding, they lie on the limestone layers of the Aidynsay Beds Fm

Upper contact

The upper boundary, due to discontinuous disturbances, is not established.

Regional extent

Northern Nuratau ridge, Merishkor Mountain, two sublatitudinal strips in the basin of the Say Abartkan and between the springs Chashma-Zrak and Shaly. Dzyush Beds Fm belong to the Kurgan Horizon and are an analogue of the upper part of the Abartkan Beds Fm.

GeoJSON

null

Fossils

Contains graptolites – Neodiversograptus nilssoni (Barr.), Monograptus ex gr. uncinatus Tullb., Pristiograptus Dubius(Suess.), Saetograptus (Colonograptus) colonus Barr.; trilobites - Kosovopeltis cf. crebristiota (Lindstr.), Prionopeltis striatus striatus H. et C., Scharia ex gr. Micropyga H. et C.; brachiopods - Conchidium lajlakense Nikif.

Age

Upper Silurian, Ludlow

Age Span:

Beginning stage:

Gorstian

Fraction up in beginning stage:

0.15

Beginning date (Ma):

426.48

Ending stage:

Gorstian

Fraction up in the ending stage:

1.0

Ending date (Ma):

425.01

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)”