Kokichegeashui Fm
Period:
Jurassic
Age Interval:
Middle Callovian (J3), Sar2
Province:
East Tajik (easternmost Pamir)
Type Locality and Naming
Includes in Sarykoln district (Istyk type section (Kokchagin area)
Synonym: Kokichegeashuiskaya Suite, кокичеrеашуйскую
Reference section:
Lithology and Thickness
(80-100 m), is composed of earthy greenish-gray argillite.
Lithology Pattern:
Claystone
Relationships and Distribution
Lower contact
Schematic stratigraphic column indicates the lower contact as Kutatyr Fm (as in Kumteish area)
Upper contact
Schematic stratigraphic column indicates the upper contact as Kichikhan-Yuly Fm
Regional extent
In the Kokchaginsky area, in the basin of the rivers Zhilgakochusu (Kokchagi), Khan-Yuly.
GeoJSON
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Fossils
Age
Middle Callovian.
Age Span:
Beginning stage:
Callovian
Fraction up in beginning stage:
0.3
Beginning date (Ma):
164.16
Ending stage:
Callovian
Fraction up in the ending stage:
0.4
Ending date (Ma):
163.79
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Extracted from Baratov, R. B. (1976). Subdivisions of stratified and intrusive rocks of Tajikistan. Donish, Dushanbe, 276.