Borehole Sandy-siltstone Fm
Period:
Cretaceous
Age Interval:
Hauterivian, U2
Province:
Ustyurt-Sultanuzdag
Type Locality and Naming
By the predominance of sandstones and siltstone (aleurolites). Pitnyak uplift. I.M.Abdurazimov in 1996.
Synonym:
Lithology and Thickness
Sandstones, siltstone (aleurolites), dark gray clays with layers of polymictic conglomerates. Thickness 50-200 m.
Lithology Pattern:
Fine-grained sandstone
Relationships and Distribution
Lower contact
Lies conformably on the Borehole Conglomerate-sandstone Fm
Upper contact
It is overlain with erosion by the Sultanbobin Fm. Schematic stratigraphic column indicates Chimbay Fm
Regional extent
Pitnyak uplift, Northwest Kyzylkumy, Khorezm depression. Boreholes.
GeoJSON
null
Fossils
Contains a complex of spores and pollen.
Age
Conditionally belongs to the Aptian stage lower+middle(?) Used in the legend of the Pre-Aral subseries to geological maps of the m-ba 1: 200000,1998. Put as base Hauterivian as TEMP for Schematic Stratigraphic column graphics -- BUT "lower+middle Aptian" => coeval with Cimbay-Khodzeilin Fm !
Age Span:
Beginning stage:
Hauterivian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
132.60
Ending stage:
Hauterivian
Fraction up in the ending stage:
0.7
Ending date (Ma):
128.33
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)”