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

Rabindzhan Formation

Rabindzhan Fm

Period:

Silurian

Age Interval:

Pridoli, Z5a

Province:
Zarafshan-N.Gissar

Type Locality and Naming

Along the height of Rabindjan, northeastern Zirabulak Mountains. A.A. Shapkin et al., 1978 (238, p.14). Hypostratotype on the height of Chupan-Ata.

Synonym: Rabindzhan Suite, Рабинджанская св., Rabindjan Fm

Lithology and Thickness

The Rabindzban Fm consists of jaspers, cherts, radiolarites of green, dark gray, black color, interbedded with yellow-red-brown, yellowish-green and light brown argillites, clay-siliceous slates, dark gray limestones and basaltic lava flows. Thickness 150-190m.

Lithology Pattern:

Chert

Relationships and Distribution

Lower contact

Stratigraphic contacts are not established, the lower contact is assumed to be conformable with the Chupanatin Fm.

Upper contact

Stratigraphic contacts are not established

Regional extent

Mountains Rabindzhan and Chunan-Ata, southern foothills of the South Nuratau Range, Mount Vaush.

GeoJSON

null

Fossils

Conodonts inclusive - Ozarkodina remscheidensis costeinhorensis (Wall.), O. aff. prolata Maws., Pandorinella mioae Bult., P. steinhornensis (Ziegler.), Polygnathus costatus Klap., Palmatolepis cf. hassi Müll. et Müll., P. cf. foliacea Sann., P. minuta Br. et M., P. cf. crepida Sann., P. glabra Ulr. et Bass., P. gracilis Br. et M., Polygnathus purus Voges., Gnathodus cf. punctatus Ziegler., Pseudopolygnathus multistriatus M. et Thom, P. cf. inequalis (Cooper.), «Apathognathus» sp. and others; radiolarians of the middle-late Devonian - Entactinosphaera sp. (E. cf grandis Naz.), Astroentactinia sp. (A. cf. stellata Naz.), Spongentactinella sp. and others.

Age

The section of the formation belongs to the condensed type, covering the age interval from the Pridoli of the late Silurian to the Serpukhovian of the early Carboniferous. The age is determined by conodonts, characterizing most of the zones from the Pridoli to the Vise-Serpukhovian. V.S. Korsakov et al. (238) determine the age of the Rabindzban Fm as Early Carboniferous (Tournai-Visean), considering the older late Silurian and Devonian fauna to be re-deposited. K.S. Ivanov et al. (206) determine the age of the formation within the limits of the Early Silurian to Carboniferous (Vise-Serpukhov) based on conodont collections.On the State Geological Map-500 of Uzbekistan (460), According to the decision of the editorial board, the Chupanatin Fm, which are dated as late Silurian-early Carboniferous, are included in the composition of the Rabindzhan Fm.(Arbitary 70% up in Lochkovian top for graphics to avoid overlap, even though extends much higher)

Age Span:

Beginning stage:

Pridoli

Fraction up in beginning stage:

0.0

Beginning date (Ma):

422.73

Ending stage:

Lochkovian

Fraction up in the ending stage:

0.7

Ending date (Ma):

414.38

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)”