Akmechet Fm
Period:
Cretaceous
Age Interval:
Middle Cenomanian, B1a
Province:
SW Gissar
Type Locality and Naming
After the village of Akmechet, Southwest Tajikistan. M.R. Jalilov, 1968 (190, p. 43). Stratotype at Chorokh Pass, Babatag Ridge, 3 km northwest of Akmechet village. Included in the Tagarin Horizon (56; 362; 383; 452).
Synonym: Akmechet Suite, Акмечетская св.
Lithology and Thickness
Greenish-gray sandstones, siltstone (aleurolites), gray limestones with layers of white gypsum and raspberry clays in the middle part. Thickness 46m.
Lithology Pattern:
Sandy limestone
Relationships and Distribution
Lower contact
Conformably overlies the Chorrokh Suite
Upper contact
It is conformably overlain by the Gazdagan Fm
Regional extent
Babatag Ridge.
GeoJSON
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Fossils
Contains gastropods - Oligoptyxis bobkovae Dzhal.; foraminifers - Gaudryinopsis asiaticus (N.Byk.), Bykoviella chinaria Kortch.
Age
Belongs to the middle Cenomanian, in Strat. Sl. (446) - to the upper and lower Senonian (Cenomanian).
Age Span:
Beginning stage:
Cenomanian
Fraction up in beginning stage:
0.4
Beginning date (Ma):
97.86
Ending stage:
Cenomanian
Fraction up in the ending stage:
0.75
Ending date (Ma):
95.55
Depositional setting
Depositional pattern:
Additional Information
Compiler:
I.M. Abdurazimova – In: GeoGPT translation of: “Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian)”