Laulau Formation

Laulau Fm

Period:

Cretaceous

Age Interval:

upper Turonian-Santonian, U6

Province:
Ustyurt-Sultanuzdag

Type Locality and Naming

In the Laulau Mountains, Central Kyzylkum. I.M. Abdazimova, 1988 (24, pp.66-67). Stratotype on the northwest slope of the Laulau Mountains.

Synonym: Laulau Suite, Лауланская св.

Lithology and Thickness

Coastal-marine sands, sandstones, yellow, brown, orange-red, gray with interlayers of greenish-gray and tobacco clays. Thickness 55-195m.

Lithology Pattern:

Sandstone

Relationships and Distribution

Lower contact

In Central Kyzylkum, it overlies with erosion on the Kendyktubin Fm. In the Pitnyak Uplift - overlies with erosion on the Khyrsbulak Fm

Upper contact

It is overlain with erosion by the Karakatin Fm. In the Pitnyak Uplift – it is overlain with erosion by the Borehole Terrigenous-Carbonate Fm.

Regional extent

Central Kyzylkum, Pitnyak Uplift.

GeoJSON

null

Fossils

In the Pitnyak Uplift, it is divided into lower and upper sub-suites. Contains ammonites - Stantonoceras polyopsis amudariensis Iljin, St. guadolupae asiaticum Iljin, Lewesiceras asiaticum Iljin; marine bivalve mollusks - Inoceramus percostatus Mül., Exogyra dharanensis Vinok., Megatrigonia syrdariensis Arkh., Gyropleura vakhshensis Bobk.; gastropods Gyrodes subtenellus (Pčel.); foraminifera - Trochammina uzbekistanica Zhuk., Gaudryinella pseudoasiatica N. Byk., Pseudoclavulina kasarinovi Suleim.; ostracods Schuleridea luppovi Mand.

Age

Belongs to the upper Turonian-Santonian.

Age Span:

Beginning stage:

Turonian

Fraction up in beginning stage:

0.7

Beginning date (Ma):

90.74

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. Abdazimova – In: GeoGPT translation of: “Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian)”