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

Chashmaobzan Formation

Chashmaobzan Fm

Period:

Cretaceous

Age Interval:

lower Turonian, B1

Province:
Bukhara-SW Gissar

Type Locality and Naming

Along the ridge of outcrops, located south of the Tashkent-Termiz highway, S.W. Gissar. Kh.Kh.Mirkamalov, M.E.Egamberdyev, 1969 (300, p.64). Stratotype - ridge of outcrops, located south of the Tashkent-Termiz highway, between the meridians of the Kana River and the Akbrat settlement. Lower formation in Adamtash Gr

Synonym: Chashmaobzan Suite, Чашмобазинская св., Talhab Fm (446).

Lithology and Thickness

Upper part - clays with layers of siltstone (aleurolites).

Lower part - greenish-gray clays with light marls and calcareous siltstone (aleurolites), at the base of the suite

Total thickness 100-200m.

Lithology Pattern:

Sandy_claystone

Relationships and Distribution

Lower contact

Conformably overlies the Gazdagan Fm

Upper contact

It is also overlain by the Dekhkanabad Fm

Regional extent

Southwestern Gissar. corresponds to the "m" suite of S.N. Simakov (415) or beds with Inoceramus labiatus (114).

GeoJSON

null

Fossils

Belongs to the lower Turonian

Age

Age Span:

Beginning stage:

Turonian

Fraction up in beginning stage:

0.1

Beginning date (Ma):

93.45

Ending stage:

Turonian

Fraction up in the ending stage:

0.4

Ending date (Ma):

92.10

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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