Borehole Terrigenous Formation

Borehole Terrigenous Fm

Period:

Cretaceous

Age Interval:

Late Turonian - Santonian, U2

Province:
Ustyurt-Sultanuzdag

Type Locality and Naming

Predominantly terrigenous rocks. Khorezm depression. I.M. Abdurazimova in 1996.

Synonym: Terrigenous Topitsa, Терригенная т.

Lithology and Thickness

Divided into three sub-suites. Upper - siltstone (aleurolites), clays with interlayers of sandstones, with phosphorite pebbles at the base. Thickness up to 80m. Unconformably overlies the middle sub-suite. Middle - sands, sandstones with interlayers of clays and siltstone (aleurolites). Thickness 108-210m. Lower - clays, siltstone (aleurolites), sands, gray sandstones with interlayers of gravelites. Thickness 134-205m.

Lithology Pattern:

Sandy_claystone

Relationships and Distribution

Lower contact

Conformably overlies the Uzunkuduk-LCret Fm.

Upper contact

Schematic stratigraphic column indicates Borehole Lms Fm

Regional extent

Boreholes. Used in the legend of the Priaralskaya (Pre-Aral) subseries for geological maps of the 1:200000 scale, 1998.

GeoJSON

null

Fossils

Age

Belongs to the Cenomanian. Conditionally belongs to the late Turonian - Santonian.

Age Span:

Beginning stage:

Turonian

Fraction up in beginning stage:

0.5

Beginning date (Ma):

91.65

Ending stage:

Santonian

Fraction up in the ending stage:

1.0

Ending date (Ma):

83.65

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)”