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

Khokgaltak Beds Formation

Khokgaltak Beds Fm

Period:

Silurian

Age Interval:

upper Llandovery, Z1

Province:
Zarafshan-N.Gissar

Type Locality and Naming

By the mountain of Khokgaltag, basin of the Shing River, Zarafshan-Gissar mountain region. A.I. Lavrushevich, G.N. Menakova, 1966 (368, p.21). Stratotype in the Daurch city section. Third member in the Shing Fm. Initially described by A.A. as "H layers".

Synonym: Khokgaltakske Sloi, Хокгалтакские сл., Khokgaltak Beds, Hokgaltak Beds

Lithology and Thickness

Thin and medium-bedded black clayey dolomitized mudstone and detrital limestones and dolomites. Thickness 20-30m.

Lithology Pattern:

Shallow-marine marl

Relationships and Distribution

Lower contact

Conformably contacts with underlying Mukhak Member

Upper contact

Overlying Yakkhonin Member

Regional extent

Zarafshan-Gissar mountainous region, Daurch city.

GeoJSON

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Fossils

The identification of these deposits as independent layers is based exclusively on paleontological data. Contains corals - Tecia sp, Palaeofavosites hirtus Sok., Catenipora taimyrica (Tchern.), Halysites sp., Entelophyllum articulatum (Wahl.), Tryplasma flexuosum (Lin.), T. glabra (Lin.); brachiopods - Pentamerus magianicus Men., P. longiseptatus Boris., which are guide forms of the late Llandovery.

Age

Age Span:

Beginning stage:

Telychian

Fraction up in beginning stage:

0.5

Beginning date (Ma):

435.76

Ending stage:

Telychian

Fraction up in the ending stage:

1.0

Ending date (Ma):

432.93

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)”