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

Tangiduval Formation

Tangiduval Fm

Period:

Jurassic

Age Interval:

upper-Lower (not lowest) and Middle Bathonian, B1-B3

Province:
Bukhara-SW Gissar

Type Locality and Naming

Along the Tangiduval River, Susyztau Mountains, South-Western Gissar. N.V.Beznosov, 1970 (91, p.82).

Synonym: Tangiduval Suite, Тангидувальская св.

Lithology and Thickness

Cross-bedded sandstones with layers of claystone (argillites), siltstone (aleurolites), and limestones, which in the north, in the lower part, are replaced by siltstone (aleurolites). Thickness 3-95m.

Lithology Pattern:

Coarse-grained sandstone

Relationships and Distribution

Lower contact

Transgressive or conformable on the Degibadam Fm

Upper contact

It is overlain by the Baysun-Jur Fm.

Regional extent

South-Western Gissar and Bukhara-Karshinsky region of the Charjou steppe. The Tangiduval Fm is part of the Sarydiiyermen Horizon (165; 252).

GeoJSON

null

Fossils

Contains in the lower part of the suite ammonites - Oraniceras (Gonolkites) württembergicus (Opp.), at the top Siemiradzkia verciacensis Liss., Tulites tula Buckm. and others; marine bivalve mollusks - Astarte (Coelastare) incerta Pčel., Oxytoma cf. inaequivalve (Sow.), Posidonia buchi Roem. and others, foraminifera - layers with Nodosaria charvakensis and Epistomina kugitanica: Ophthalmidium serdjantica kintalensis Kurb. subsp.n., Lenticulina surhandarensis Kurb. sp.n., Planularia Semiinvoluta zarabagica Kurb. subsp.n., P. diibalensis Kurb. sp. n., Nodosaria charvakensis Kurb. sp. n., Lingulina dentaliniformis Terquem., Citharina heteropleura velumosemile Kurb. subsp. n. and others.

Age

The age, according to organic remains, is determined as early-middle Bathonian. I.E.Gubin (164) included the described Tangiduval Fm in the Degibadam Fm; a group of authors (382, table 13) referred the considered deposits to the Gurud Fm. At the Samarkand conference (383, table 4, p.3) the Tangiduval Fm was dated as early (without the lower part) middle Bathonian.

Age Span:

Beginning stage:

Bathonian

Fraction up in beginning stage:

0.15

Beginning date (Ma):

167.74

Ending stage:

Bathonian

Fraction up in the ending stage:

0.7

Ending date (Ma):

166.15

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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