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

Kupruk Formation

Kupruk Fm

Period:

Silurian

Age Interval:

Pridoli, Z1

Province:
Zarafshan-N.Gissar

Type Locality and Naming

Along the Kupruk River, Arg Basin, Central Tajikistan. A.I. Lavrushevich, V.I. Lavrushevich, 1972 (262, p. 63). Stratotype in the Arg Basin. Previously described as the Middle Arg Subsuite. Belongs to the Pridoli Middle formation in Arg Gr

Synonym: Kuprukskaya Formation, Купрукская св., Pholidophyllum limestones (379), A.I. Lavrushevich. Str. sl. (443).

Lithology and Thickness

Dark gray and black layered to massive dolomitized limestones to varying degrees. Thickness 350m.

Lithology Pattern:

Dolomitic limestone

Relationships and Distribution

Lower contact

Conformably overlies the Kuturak Fm

Upper contact

Conformably overlain by the Havzak Slates (Khavzak Fm).

Regional extent

Zeravshan-Gissar mountain region.

GeoJSON

null

Fossils

Characterized by rugose corals - Tryplasma (Pholidophyllum) astaticum Nikol., Lithophyllum sokolovi Lel.; brachiopods - Retria (?) argensis Nikif., R. mirus Nikif., Lissatrypa caudata Nikif. and others.

Age

Age Span:

Beginning stage:

Pridoli

Fraction up in beginning stage:

0.0

Beginning date (Ma):

422.73

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)”