Bukhaikak Fm
Period:
Cretaceous
Age Interval:
Upper Turonian, K7a
Province:
Kyzylkum Region
Type Locality and Naming
Along the Bukhaykak reservoir, Central Kyzylkum. M.E. Egamberdyev, 1963 (512, p.14). Stratotype in the Bukhaykak reservoir area.
Synonym: Bukhaykak Fm, Bukhainak Fm, Bukhaikak Suite, Бухайнакская св.
Lithology and Thickness
Variegated clays (bluish-green, green, red, purple, yellow, dark gray) with layers of cross-bedded, ripple-marked sandstones and siltstone (aleurolites). At the base, a low-power layer (0.2-0.5m) of conglomerate consisting of brown ironstone concretions with phosphorite pebbles, shark teeth, mud-eater burrows. Thickness 0-30m.
Lithology Pattern:
Sandy_claystone
Relationships and Distribution
Lower contact
Lies with erosion on the Sarbatyr-Cret Fm
Upper contact
It is overlain by the Beltau-Cret Fm
Regional extent
Central Kyzylkum, Auminzatau, Beltau, Jetymtau Mountains, Okuzkak Basin.
GeoJSON
null
Age
Belongs to the upper Turonian.
Age Span:
Beginning stage:
Turonian
Fraction up in beginning stage:
0.4
Beginning date (Ma):
92.10
Ending stage:
Turonian
Fraction up in the ending stage:
0.7
Ending date (Ma):
90.74
Depositional setting
Depositional pattern:
Additional Information
Compiler:
I.M. Abdazimova – In: GeoGPT translation of: “Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian)”