Kalkanatin-Dev Fm
Period:
Devonian
Age Interval:
Lower-Middle Devonian (?), CK9a
Province:
Chatkal-Kuramin Region
Type Locality and Naming
Along the Kalkanata Mountains, Kuraminsky ridge. B.I. Sigalov in 1956 (460, p.112-113).
Synonym: Kalkanatinskaya Suite, Калканатинская св.
Lithology and Thickness
Sequentially alternating ignimbrites, lavas, and tuffs of rhyolites and rhyodacites. Thickness 600-900m.
Lithology Pattern:
Lava
Relationships and Distribution
Lower contact
Sharply unconformably overlies the Urubulak Fm
Upper contact
It is overlain by Middle Devonian conglomerates.
Regional extent
Kuraminsky Ridge, Kalkanata Mountains, and Almalyk District, small outcrops in the basins of the Karakia, Chalaty rivers, and on the Aktashkan massif.
GeoJSON
null
Fossils
Age
Early to Middle Devonian age is accepted conditionally based on its position in the section (165).
Age Span:
Beginning stage:
Lochkovian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
419.00
Ending stage:
Eifelian
Fraction up in the ending stage:
1.0
Ending date (Ma):
385.30
Depositional setting
Depositional pattern:
Additional Information
Compiler:
B.B. Muxaŭlov – In: GeoGPT translation of: “Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian)”