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

Balakhanin Formation

Balakhanin Fm

Period:

Cretaceous

Age Interval:

lower Campanian, B1

Province:
Bukhara-SW Gissar

Type Locality and Naming

Along Mt. Balakhana, Southwest Gissar. Kh.Kh. Mirkamalov, M.E. Egamberdyev, 1969 (300, p.62). Stratotype in the Gaurdak region (western foothills and western slope of Mt. Balakhana) (114). Fourth formation in Tally-Khumon Gr

Synonym: Balakhaninian Suite, Балаханинская св., Sarykamysh Fm

Lithology and Thickness

At the bottom, sandstones, clays, shell rocks (20-30m). At the top, clays, siltstone (aleurolites) with layers of shell rocks. In Gaurdak and Akkapychagay, the composition of the suite is mainly clayey. Thickness 60-120m.

Lithology Pattern:

Claystone

Relationships and Distribution

Lower contact

Conformably overlies the Baldykhan Fm

Upper contact

Conformably overlain by the Kantau Fm.

Regional extent

Southwest Gissar. Corresponds to suite " r " of S.N. Simakov, with Liostrea acutirostris, L. michailowskii, and L. prima (51).

GeoJSON

null

Fossils

At the bottom, with marine bivalve mollusks - Liostrea acutirostris Nilss. At the top, with marine bivalve mollusks - Liostrea prima Rom.

Contains marine bivalve mollusks - Liostrea acutirostris Nilss., L. prima Rom., L. michailowskii Born., Ostrea tecticostata turkmenica Bobk.

Age

Conditionally assigned to the lower Campanian.

Age Span:

Beginning stage:

Campanian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

83.65

Ending stage:

Campanian

Fraction up in the ending stage:

0.5

Ending date (Ma):

77.91

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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