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

Oybadam-Dev Formation

Oybadam-Dev Fm

Period:

Devonian

Age Interval:

Eifelian-Givetian, Z3

Province:
Zarafshan-N.Gissar

Type Locality and Naming

Along the Oybadam stream, Turkestan Range. D.A. Starshinin in 1985 studied carbonate deposits of Upper Silurian–Devonian in the Chumkartau Mountains (460, p. 123). Stratotype at the Oybadam gorge, lower part of the Shingak River valley.

Synonym: Oybadamskaya Suite, Ойбадамская св., Oibadam Fm; Oybadam Limestone Fm; Oybadam Suite

Lithology and Thickness

Bedded dolomitic limestones, often organogenic, with rare dolomite layers. Thickness: 400-800m.

Lithology Pattern:

Dolomitic limestone

Relationships and Distribution

Lower contact

Conformably overlies the Shingak Fm

Upper contact

Transgressively overlain by the carbonate rocks of the Urmitan Fm.

Regional extent

Turkestan Range, Zarafshan River valley.

GeoJSON

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Fossils

In the limestones, brachiopods Conchidiella pseudobaschkirica Tschern. and others of the Eifelian stage, rugose corals - Dendrostella trigemma Quendst., Neospongphyllum ex gr. variabile Wd. and others of the Givetian stage.

Age

Fossil data indicate Eifelian-Givetian

Age Span:

Beginning stage:

Eifelian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

394.30

Ending stage:

Givetian

Fraction up in the ending stage:

1.0

Ending date (Ma):

378.90

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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