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

Zoy Formation

Zoy Fm

Period:

Carboniferous

Age Interval:

Upper Tournaisan - lower Visean, B2

Province:
Bukhara-SW Gissar

Type Locality and Naming

Along the Zoy Stream, Surkhan-Tau Range, southern slope of the Gissar Range. G.S. Chikryzov, Kh.V. Ryskina in 1948 (382, p. 56). Biostratotype in the valley of the Zoy Stream, in the southern part of the Surkhan-Tau Range.

Synonym: Zoyskaya Formation, Зойская св.

Lithology and Thickness

Basal conglomerates, sandstones, siltstone (aleurolites), argillites, and coaly-clayey shales with coal layers, locally dacites, liparites, and their tuffs. F.R. Bensh (102), S.Ya. Lapidus et al. (1961), E.D. Bezuglov et al. (1993) note acid tuffs in the formation. Thickness 350-550m.

Lithology Pattern:

Clayey sandstone

Relationships and Distribution

Lower contact

Unconformably overlies ancient deposits

Upper contact

Unconformably overlain by the Vakhshivar Fm.

Regional extent

Susyzatau, Baysuntau, and Surkhantau ranges.

GeoJSON

null

Fossils

Contains flora - Sublepidodendron nordenskioldii Nath., Asterocalamites scrobiculatus (Schloth.), Sphenopteris bermudensiformis (Schloth.) and others. (439).

Age

L.I. Savitskaya (395) considered the formation early Visean, G.S. Chikryzov, Kh.V. Ryskina (382) - Tournaisian. Age dated within the late Tournaisian-Visean early Carboniferous. (166; 460).

Age Span:

Beginning stage:

Tournaisian

Fraction up in beginning stage:

0.5

Beginning date (Ma):

353.02

Ending stage:

Visean

Fraction up in the ending stage:

0.5

Ending date (Ma):

338.54

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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