Kokkiin Fm
Period:
Jurassic
Age Interval:
Lower Jurassic (Hettangian-Sinemurian), F1
Province:
Fergana
Type Locality and Naming
Along the K. Kokkiya River, Fergana ridge. A.E. Dovzhikov, K. Musatov in 1941 (336, p.18). Previously distinguished under the name of the aleurolite t. (382, table 13; 383, table 5, p.3; 445; 448). E.A. Repman". P. 446.
Synonym: Kokkininskaya Suite, Коккиинская св.
Lithology and Thickness
Conglomerates, sandstones, siltstone (aleurolites), claystones with pebbles of quartz and chert. Thickness 70-500m.
Lithology Pattern:
Sandy_claystone
Relationships and Distribution
Lower contact
Unconformably overlies the Paleozoic
Upper contact
Conformably overlies the Tuyuk Fm
Regional extent
Central part of the Fergana ridge. Exposed by boreholes in the Fergana depression.
GeoJSON
null
Fossils
Contains large plant remains - Neocalamites nordenskioldii (Heer) Kryasht. et Pryn., Sphenobaiera paucipartita Nath. and a spore-pollen complex.
Age
Included in the composition of the Lower Jurassic by the Samarkand conference of 1971. M.I. Brik (120) and V.N. Ognev (336) attributed it to the Upper Triassic. For schematic stratigraphic presentation it is considered Hettangian-Sinemurian
Age Span:
Beginning stage:
Hettangian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
201.36
Ending stage:
Sinemurian
Fraction up in the ending stage:
1.0
Ending date (Ma):
192.90
Depositional setting
Depositional pattern:
Additional Information
Compiler:
V.V. Kurbatov – In: GeoGPT translation of: ”Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian)"