Jerkapchal Fm
Period:
Jurassic
Age Interval:
Lower-Middle Oxfordian (J3), Sar2
Province:
East Tajik (easternmost Pamir)
Type Locality and Naming
Includes in Sarykoln district (Istyk type section (Kokchagin area)
Synonym: Jerkapchalskaya Suite, Жеркапчальская, Zherkapchalskaya, жеркапчальскую
Reference section:
Lithology and Thickness
It is composed of white massive and giant-bedded reef limestones. (400 m)
Lithology Pattern:
Reef limestone
Relationships and Distribution
Lower contact
Schematic stratigraphic column indicates the lower contact as Khan-Yuly Fm
Upper contact
Schematic stratigraphic column indicates the upper contact as Pustan Fm
Regional extent
In the Kokchaginsky area, in the basin of the rivers Zhilgakochusu (Kokchagi), Khan-Yuly.
GeoJSON
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Fossils
It consists with remains of corals, the study of which is not yet complete.
Age
Based on its position in the section, the suite is conditionally considered Lower-Middle Oxfordian.
Age Span:
Beginning stage:
Oxfordian
Fraction up in beginning stage:
0.2
Beginning date (Ma):
160.18
Ending stage:
Oxfordian
Fraction up in the ending stage:
0.6
Ending date (Ma):
157.48
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Extracted from Baratov, R. B. (1976). Subdivisions of stratified and intrusive rocks of Tajikistan. Donish, Dushanbe, 276.