Katrangin Formation

Katrangin Fm

Period:

Devonian

Age Interval:

Lower-Middle Devonian, CK9c

Province:
Chatkal-Kuramin Region

Type Locality and Naming

Named after the Katranga River, Kuramin Range. Zh.N. Kuznetsov, et al., 1964.

Synonym: Katrangin Suite, Катрангинская св.

Lithology and Thickness

Massive agglomerate and amygdaloidal lavas and tuffs of andesites, andesidacites, less frequently dacites. At the base, a layer (thickness of 15-30m) of sandstones, siltstone (aleurolites), and conglomerates is noted. The thickness of the volcanic cover varies from 90 to 700 m on different sections.

Lithology Pattern:

Volcanics

Relationships and Distribution

Lower contact

Volcanics lie with angular unconformity on the Urubulak Fm

Upper contact

It is conformably overlain by Middle Devonian deposits. (165,460).

Regional extent

Kuramin Range, Almalyk ore region, interfluve of the Karakia and Saubulak rivers, upper reaches of the Sardobsay River, and in the form of small outcrops in the Tashgeze-Altyntopkan-Chalata strip.

GeoJSON

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Fossils

Age

Lower-Middle Devonian

Age Span:

Beginning stage:

Lochkovian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

419.00

Ending stage:

Emsian

Fraction up in the ending stage:

1.0

Ending date (Ma):

394.30

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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