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

Yatak Formation

Yatak Fm

Period:

Silurian

Age Interval:

Wenlock-Pridoli, N6

Province:
Nuratau

Type Locality and Naming

Along the Yatak stream, northern slope of the N. Nuratau ridge. P.N. Podkopaev et al. in 1961 (1964). Stratotype on the right bank of the Kurukulsay River.

Synonym: Yatak Suite, Ятакская св.

Lithology and Thickness

The section is represented by scattered fragments of carbonate rocks, consisting of micritic, massive, polydetrital-algal gray and dark-gray limestones, interbedded with clayey nodular limestones

Lithology Pattern:

Limestone

Relationships and Distribution

Lower contact

Stratigraphic contacts not established.

Upper contact

Stratigraphic contacts not established.

Regional extent

Middle part of the northern slope of the North Nuratau ridge from the village of Andreevka in the west to the Piyazly Mountains in the east (I.A. Kim et al., 1990).

GeoJSON

null

Fossils

Containing stromatoporoids - Ecclimadictyon cf. fastiguatum Nich., Parastriatopora sp. and others, tabulates - Syringopora ex gr. fascicularis, S. sp. (ex gr. ferganensis) Fom. and others, brachiopods - Conchidium sp. and others of the Late Wenlock-Pridoli.

Age

P.N. Podkopaev et al. (1964) considered the age of the suite Ludlovian; I.A. Kim et al. (1990) - late Silurian; Z.M. Abdurazimova et al. (1996) in the Yatak Fm include all upper Wenlock-Pridoli carbonate deposits (including boulders and fragments), developed on the northern slope of the S. Nuratau ridge (460).

Age Span:

Beginning stage:

Sheinwoodian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

432.93

Ending stage:

Pridoli

Fraction up in the ending stage:

1.0

Ending date (Ma):

419.00

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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