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

Khozhalchin Formation

Khozhalchin Fm

Period:

Neogene

Age Interval:

Upper Pliocene, B1

Province:
Bukhara-SW Gissar

Type Locality and Naming

By the village of Khozhalcha, South of Gissar. G.Yu. Alferov et al., 1969.

Synonym: Khozhalchinskaya Suite, Хожальчинская св.

Lithology and Thickness

Alluvial and lacustrine-alluvial yellowish-brown feldspar-quartz sands and sandstones, subordinate clays and siltstone (aleurolites). Thickness up to 500 m. The sands and sandstones of the Khozhalchin Fm form the upper, main in thickness, part of the section of the Tandyrchin Fm, from the composition of which they were distinguished.

Lithology Pattern:

Clayey sandstone

Relationships and Distribution

Lower contact

Along the stratigraphic position, it lies on the Uchkolsay Fm

Upper contact

With erosion overlain by the Guzar Fm.

Regional extent

South of Gissar, Beshkent Depression.

GeoJSON

null

Fossils

Contains Upper Pliocene gastropods - Thodoxus cf. pallasi Lindn., Th. sp., Micromelania ex gr. apsheronica Koles., M. sp., Clessiniolla sp., Caspia sp., Steptocerella (?) voluta Andrus.; ostracods - Cyprideis littoralis Br., Cypris mandelstamica Lubl. nova, Limnocythere quadrata Mand., L. acristata Schn., L. teniureticulata Ros.

Age

Initially, A.A. was attributed to the Upper Pliocene, then by G.Yu. Alferov et al. (61) to the Middle Miocene. According to B.I. Pinhasov (144), the age is Upper Pliocene, since the sands of the X. suite, in their extension, pass into the Dengizkul Fm, with which they represent a single geological body.

Age Span:

Beginning stage:

Piacenzian

Fraction up in beginning stage:

0.5

Beginning date (Ma):

3.09

Ending stage:

Piacenzian

Fraction up in the ending stage:

1.0

Ending date (Ma):

2.58

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)”