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

Dzhaus Beds Formation

Dzhaus Beds Fm

Period:

Devonian

Age Interval:

, Z1

Province:
Zarafshan-N.Gissar

Type Locality and Naming

Along the village of Dzhaus, Kashkadarya region. Zarafshan ridge. M.A. Zhonsonitskaya, 1974 (384, p.27). Stratotype in the Hodja-Kurgan village. Previously, A.I. Kim and N.M. Larin identified these deposits as the goniatite-tentaculite zone (368). M.B. Epuna". Str. layers (443).

Synonym: Dzhausskie Sloi, Джауские сл. Dzhausian Beds

Lithology and Thickness

Interbedding of black calcareous claystones (argillites) and flaggy limestones. In the middle part - coarse-grained, crinoidal limestones. Thickness 133m.

Lithology Pattern:

Pelagic marl

Relationships and Distribution

Lower contact

Along the bedding, the Fm lies on the Kimov Beds Fm

Upper contact

It is overlain with a gradual transition by the Obisafit Beds Fm.

Regional extent

Western part of the Zarafshan ridge, basin of the Kashkadarya River. They are correlated with the upper Zlichov Fm and Daley Fm slates of Barrandien.

GeoJSON

null

Fossils

Characteristic Goniatites - Gyroceratites laevis Eichenb., Erbenoceras kimi Bogosl., Mimosphinctes cf. erbeni Bogosl., M. tripartitus Eichenb., Teicherticeras (Convoluticeras) rudicostatum Bogosl., Isorthis snajdri Havl.; brachiopods Productella mesodevonica Nal., Tentaculites - Nowakia barrandei Bouč. et Prantl, N. elegans Barr., N. cancellata Richter; conodonts - Polygnathus perbonus Philip., P. inversus Klap. et Jahn., P. serotinus Telford, Isoprusis laportei H. et C., trilobites Acanthopyge peneaui Pillet.

Age

Lower Devonian

Age Span:

Beginning stage:

Emsian

Fraction up in beginning stage:

0.5

Beginning date (Ma):

402.41

Ending stage:

Emsian

Fraction up in the ending stage:

0.75

Ending date (Ma):

398.35

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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