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

Tupolang Formation

Tupolang Fm

Period:

Jurassic

Age Interval:

lower-middle Oxfordian, B1

Province:
Bukhara-SW Gissar

Type Locality and Naming

Along the river Tupolang, Mechetli Mountains. N.V. Beznosov, V.V. Kurbatov in 1980 used the name proposed by V.A. Prozorovsky and Yu.L. Verba in 1971 at the Samarkand conference. Stratotype in the Sangmilya section, southern slope of Gissar. Middle formation in Kugitang Gr in SW Gissar

Synonym: Tupolang Suite, Туполангская св.

Lithology and Thickness

Variegated (gray, red, brown, green, yellow) siltstone (aleurolites), sandstones, rarely gravelites, marls, limestones, dolomites, and lenses of gypsum (anhydrites). Thickness 80-140m.

Lithology Pattern:

Siltstone

Relationships and Distribution

Lower contact

Along the position, it lies on the Zarmas Fm, Baysun-Jur Fm or with erosion on the Sandzhar Fm.

Upper contact

Overlain with visible conformity by the Gardarin Fm of the Gaurdak Gr.

Regional extent

Mechetli, southern slope of Gissar. Bukhara-Karshinsky district (Bukhara stage). Replaced laterally by the Kurek Fm or the Zarmas Fm (upper part).

GeoJSON

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Fossils

In the lower part contains ammonites - Peltoceras sp., Oppelia sp., Pseudopeltoceras sp.; marine bivalve mollusks - Plesiocyprina gissarensis Rep., Camptonectes normalicus Rep., Camptonectes tachtensis Rep. and others; foraminifers - Karaisella uzbekistanica Kurb. and others.

Age

Age determined within the lower-middle Oxfordian, taking into account the position of the Tupolang Fm in the section and facies replacements laterally. (165).

Age Span:

Beginning stage:

Oxfordian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

161.53

Ending stage:

Oxfordian

Fraction up in the ending stage:

0.7

Ending date (Ma):

156.81

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)”