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

Shaidaraz Formation

Shaidaraz Fm

Period:

Devonian

Age Interval:

Upper Devonian, K9

Province:
Kyzylkum Region

Type Locality and Naming

Along the Shaida-Raz collective farm, Kuldjuktau Mountains, Central Kyzylkum. Y.B. Aysanov et al., 1984.

Synonym: Shaidarazskaya Suite, Шайдаразская св.

Lithology and Thickness

Light and dark gray banded, marbled limestones. Thickness up to 100 m.

Lithology Pattern:

Limestone

Relationships and Distribution

Lower contact

The relationship with underlying formations is unknown. Schematic stratigraphic column indicates the lower contact as Arankazgan Fm

Upper contact

It is transgressively overlain by a terrigenous facies of the Taushan Fm (44; Aysanov et al., 1984).

Regional extent

Central Kyzylkum, Kuldjuktau Mountains, at a single point (2 km southwest of the Shaida-Raz collective farm).

GeoJSON

{"type":"Feature","geometry":{"type":"Polygon","coordinates":[[[63.649,40.361],[63.63,40.418],[63.677,40.45],[63.734,40.432],[63.756,40.399],[63.732,40.358],[63.649,40.361]]]}}

Fossils

Limestones are filled with remains of amphipores and crinoids Pentagonocyclicus obesus Yelt., Hexacrinites ex gr. kartzevae Yelt. et Dubat. of late Devonian age.

Age

Age Span:

Beginning stage:

Frasnian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

378.90

Ending stage:

Famennian

Fraction up in the ending stage:

1.0

Ending date (Ma):

359.30

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)”