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

Chupanatin Formation

Chupanatin Fm

Period:

Silurian

Age Interval:

Wenlock-Ludlow, Z5a

Province:
Zarafshan-N.Gissar

Type Locality and Naming

Along the Chupan-Ata uplift, northeastern outskirts of the city of Samarkand. V.S. Korsakov et al., 1984.

Synonym: Chupanatin Suite, Чупанатинская св.

Lithology and Thickness

Sandstones, siltstone (aleurolites), often volcanomictic, interbedded with silty (aleurolitic) and calcareous claystones (argillites), clay-siliceous slates; tuffs and tuffites of acidic and intermediate composition. Thickness 300-450m.

Lithology Pattern:

Fine-grained sandstone

Relationships and Distribution

Lower contact

The lower contact is unknown

Upper contact

The upper contact with the Rabindzhan Fm is unclear, possibly conformable.

Regional extent

Within the uplift of Chupan-Ata. Some researchers (460) include the Chupanatin in the composition of the Rabindzhan Fm.

GeoJSON

null

Fossils

In the lower part contains Wenlock graptolites Monograptus aff. flemingi (Salter.), Monoclimacis sp., Cyrtograptus sp.; in the upper Ludlow - Colonograptus colonus (Barr.), Neodiversograptus nilssoni (Lapw.), Lobograptus crinitus (Wood.), L. scanicus (Tullb.) and others (166; Korsakov et al., 1993).

Age

It belongs to the Wenlock stage - Ludlow stage of the Silurian.

Age Span:

Beginning stage:

Homerian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

430.62

Ending stage:

Ludfordian

Fraction up in the ending stage:

1.0

Ending date (Ma):

422.73

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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