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

Khodzhaikan Formation

Khodzhaikan Fm

Period:

Jurassic

Age Interval:

Upper Jurassic, B2

Province:
Bukhara-SW Gissar

Type Locality and Naming

Named after the Khojaikan mine, southeastern Kugitangtau, southern Gissar. Collective authors, 1985 (466, p.50). It is a junior synonym of most of the Gaurdak Gr. The term is used only within the territory of Turkmenistan. [But, following the USGS map, this is the southern Gissar region.]

Synonym: Gaurdak Gr, Khojaikan Suite, Ходжаикканская св.

Lithology and Thickness

Layers of salts, which are white and light-gray at the bottom, and pink in the upper part. The upper part of the Khodzhaikan Fm consists of rhythmically alternating layers of three mountainous potassium salts and three mountainous halites. The average thickness of the halite layer is 230-250 m, and the potassium-bearing layer is 125-170 m. The suite ends with "cover anhydrites" containing interlayers of red clays, marls, and limestones. The average thickness of the "cover anhydrites" is 10-15 m.

Lithology Pattern:

Gypsum-Anhydrite

Relationships and Distribution

Lower contact

Schematic stratigraphic column indicates the lower contact as Kugitang Gr

Upper contact

Schematic stratigraphic column indicates the upper contact as Karabil Fm

Regional extent

GeoJSON

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Fossils

Age

The authors accepted the Tithonian age of the suite, which is included in the Balh Gr (see). [Used span of Kimm-Tith, following USGS and Mordvintsev.]

Age Span:

Beginning stage:

Kimmeridgian

Fraction up in beginning stage:

0.35

Beginning date (Ma):

152.84

Ending stage:

Tithonian

Fraction up in the ending stage:

1.0

Ending date (Ma):

143.10

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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