Tuyuk Fm
Period:
Jurassic
Age Interval:
Middle Jurassic (lower part), F1, F2
Province:
Fergana
Type Locality and Naming
Along the Tuyuk River, Fergana Range. V.N. Ognev, 1946 (336, p.21).
Synonym: Tuyuk Suite, Туюкская св.
Lithology and Thickness
Sandstones, siltstone (aleurolites), claystones, coals, sometimes conglomerates at the base. Thickness 140-370m.
Lithology Pattern:
Sandy_claystone
Relationships and Distribution
Lower contact
Transgressively lies on the Paleozoic and conformably on the Kokkiin Fm
Upper contact
Transgressively overlain by the Chaartash Fm
Regional extent
Central part of the Fergana Range, Fergana Depression.
GeoJSON
null
Fossils
Contains large plant remains - Neocalamites nordenskioldii Heer., Clathropteris obovata Oishi, Cladophlebis sulcata Brick.
Age
Belongs to the lower part of the Middle Jurassic (383, table 5, p.3), some authors (57; 119; 336; 382, table 13) - to the Lower Jurassic; in the Strat. Sl. (446) - to the Lower(?) - Middle(?) Jurassic.
Age Span:
Beginning stage:
Pliensbachian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
192.90
Ending stage:
Toarcian
Fraction up in the ending stage:
1.0
Ending date (Ma):
174.70
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)"