Gurumdin Fm
Period:
Jurassic
Age Interval:
Sinemurian (J1), M3a
Province:
SE Tajik (SE Pamir)
Type Locality and Naming
Includes in SE Murghab district (Gurdumdin type section)
Synonym: Gurumdinskaya suite, гурумдинская свиты
Reference section:
Lithology and Thickness
It is composed of coarse-bedded, and at the top, light-colored massive limestones, partly reef-forming. (80-400 m)
Lithology Pattern:
Reef limestone
Relationships and Distribution
Lower contact
Conformably underlying Darbazatazh Fm
Upper contact
Regional extent
It characterizes the Chor of the Southeastern Pamir.
GeoJSON
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Fossils
Organic remains are only characteristic of the Gurumdin Fm, containing Hettangian Sinemurian pelecypods Cardinia cf. elliptica Quenst., C. cf. hybrida Quenst., Pachyrisma aff. chamaeformis Schloth.
Age
Sinemurian
Age Span:
Beginning stage:
Sinemurian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
199.46
Ending stage:
Sinemurian
Fraction up in the ending stage:
1.0
Ending date (Ma):
192.90
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Extracted from Baratov, R. B. (1976). Subdivisions of stratified and intrusive rocks of Tajikistan. Donish, Dushanbe, 276.