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

Egarbelitau Formation

Egarbelitau Fm

Period:

Devonian

Age Interval:

Middle Devonian, N4

Province:
Nuratau

Type Locality and Naming

By the mountains of Egarbelitau, northern foothills of the N. Nuratau ridge. V.P. Vashchenko et al. in 1990 (Korsakov et al., 1993f). Stratotype to the west of the Kutarma quarry (Korsakov et al., 1993f).

Synonym: Egarbelitauskaya Suite, Егарбелитауская св.

Lithology and Thickness

Thick-bedded, aphinitic, grey limestones, rarely conglomeratic limestones. Thickness more than 300 m.

Lithology Pattern:

Limestone

Relationships and Distribution

Lower contact

With unclear relationships, it overlies the Asmansay Fm

Upper contact

It is conformably overlain by the Kutarmay Fm (Usmanov et al., 1999f.).

Regional extent

Northern foothills of the N. Nuratau ridge, fragmentarily, in tectonic blocks in Egarbelitau, Bozaigyr, Balyklitau. The most complete undisturbed section of the suite was studied by R.R. Usmanov et al. (1999f) at the eastern end of the southern branch of Balyklitau (thalweg of the Kly River).

GeoJSON

null

Fossils

Contains foraminifers Archaesphaera minima Sul., Parathurammina sp., Bisphaera cf. irregularis Bir., Cribrosphaeroides sp.; tabulates - Favosites ex gr. nikiforovae Chekh., Crassialveolites ex gr. multiperforatus Sub., Caliopora sp.; brachiopods - Stringocephalus burtini Deff.; stromatoporoids - Amphipora ex gr. alveolata Ermak., A. ex gr. vesiculosa Ermak.; conodonts - Pandorinellinae sp. - of Middle Devonian age.

Age

Accepted in the volume of the Middle Devonian. (460). Put as Base Givetian for graphic purposes - "Middle Devonian; but underlying formations include Emsian-Frasnian => put as base Famennian for graphic purposes

Age Span:

Beginning stage:

Givetian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

385.30

Ending stage:

Givetian

Fraction up in the ending stage:

1.0

Ending date (Ma):

378.90

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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