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

Oibadam-Sil Formation

Oibadam-Sil Fm

Period:

Silurian

Age Interval:

Lower Llandovery, N5a

Province:
Nuratau

Type Locality and Naming

By the Oybadam stream, Chumkartau Mountains, Turkestan Range, A.N.Golikov in 1985 (165, p.51). Stratotype in the upper reaches of the Oybadam stream.

Synonym: Oybadam Fm, Oybadamskaya Suite, Ойбадамская св.

Lithology and Thickness

Aspidine-black carbonaceous-siliceous-schistose slates. Thickness 400-490m.

Lithology Pattern:

Claystone

Relationships and Distribution

Lower contact

Lower boundary is not established

Upper contact

Overlain by the Guralash Fm

Regional extent

Chumkartau Mountains, upper reaches of the Palagmansay, basin of the Akkurgan stream and north of it.

GeoJSON

null

Fossils

Contains graptolites - Paraclimacograptus innotatus (Nich.), Akidograptus acuminatus (Nich.), A. cuneatus Chal., Cystograptus vesiculosus (Nich.), Raphidograptus tornquisti (Nich.), Dimorphograptus swanstoni (Lapw.), Coronograptus cyphus (Lapw.) and others, characteristic of the Akidograptus acuminatus–Coronograptus cyphus zones.

Age

Silurian, early Llandovery (Raddan). (165; 460).

Age Span:

Beginning stage:

Rhuddanian

Fraction up in beginning stage:

0.1

Beginning date (Ma):

442.81

Ending stage:

Rhuddanian

Fraction up in the ending stage:

1.0

Ending date (Ma):

440.49

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)”