Neogene

Paleogene

Cretaceous

Jurassic

Triassic

Permian

Carboniferous

Devonian

Silurian

Ordovician

Cambrian

Neoproterozoic

Mesoproterozoic

Paleoproterozoic

Main source = Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian) Translated to English by the GeoGPT group, Zhejiang Lab, Hangzhou, China--see About

Gadzhak Formation

Gadzhak Fm

Period:

Neogene

Age Interval:

Lower-Middle Miocene, B2

Province:
Bukhara-SW Gissar

Type Locality and Naming

Along the village of Gadzhak, Baysun depression. Yu.R. Smolnikov et al., 1971.

Synonym: Gadzhak Suite, Гаджакская св.

Lithology and Thickness

Brick-red sandstones with interlayers of siltstone (aleurolites) and clays. Thickness 250-570m.

Lithology Pattern:

Fine-grained sandstone

Relationships and Distribution

Lower contact

With erosion, it lies on the Shurysay Fm

Upper contact

With erosion, it is overlain by gray, brownish-gray, and on the western slope of Babatag, orange sandy rocks of the Baysun-Neog Fm.

Regional extent

Baysun and Surkhandarya depressions. It is correlated with the Mailisay Fm of Fergana, the Sulusay Fm of the Shurasan section, and the Agitmin Fm of the Kyzylkum.

GeoJSON

null

Fossils

Contains ostracods - Eucypris glabra Bod., E. koktalensis Bod., Kassinina aff. beliaevskyi Mand., Cyprinotus arasensis Bod., C. numulis Schn., Limnocythere depressa Schn., Darwinula stevensoni (Br. et Rob.), D. nadinae Bod., Cyclocypris regularis Schn., Mediocypris sp.

Age

Age, according to A.A. and G.Yu. Alferov and others (61), - mid-Miocene. B.I. Pinhasov refers it to the lower mid-Miocene.

Age Span:

Beginning stage:

Burdigalian

Fraction up in beginning stage:

0.5

Beginning date (Ma):

18.22

Ending stage:

Langhian

Fraction up in the ending stage:

1.0

Ending date (Ma):

13.82

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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