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

Tyubetagan Formation

Tyubetagan Fm

Period:

Cretaceous

Age Interval:

Lower Cenomanian, B1

Province:
Bukhara-SW Gissar

Type Locality and Naming

Along the Tyubegatan section, Southwest Gissar. Collective authors, 1959 (382, Table 16). Included in the Tyubegatan Horizon (56; 114; 166; 189; 190; 452; 458). Lower formation in Tarkapantigay Gr

Synonym: Tyubegatan Suite, Тюбетагатская св.

Lithology and Thickness

Gray, greenish-gray clays with interlayers of sandstones, shell limestones. Thickness 80-190m.

Lithology Pattern:

Shallow-marine marl

Relationships and Distribution

Lower contact

Conformably overlies the Shirabad Fm

Upper contact

Conformably overlain by the Karikansay Fm.

Regional extent

Southwest Gissar.

GeoJSON

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Fossils

Contains ammonites - Karamaites gaurdakense (Lupp.), Mediasiaceras beliakovae Iljin; marine bivalve mollusks - Chlamys elongatus Lam., Korobkovitrigonia gaurdakensis Beliak., Lopha dichotoma Bayle, Rhynchostreon columbum (Lam.), Rh. chaperi (Bayle); gastropods Haustator (?) schirabadensis (Dzhal.), Sogdianella praesupernata (Dzhal.); foraminifers - Trochanmina kugitangensis N. Byk., Trochamminoides cenomanicus (Zhuk.); ostracods - Cytherella latissima Andrv., C. elegans Andrv., Cythereis gaurdakensis Andrv.; complex of spores and pollen.

Age

Belongs to the lower part of the lower Cenomanian; in the Strat. vol. (446) - to the Cenomanian; Along the Decision... . . . . , 1977 (383), - to the lower Cenomanian.

Age Span:

Beginning stage:

Cenomanian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

100.50

Ending stage:

Cenomanian

Fraction up in the ending stage:

0.2

Ending date (Ma):

99.18

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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