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

Toychisay Formation

Toychisay Fm

Period:

Cretaceous

Age Interval:

Santonian, B1

Province:
Bukhara-SW Gissar

Type Locality and Naming

Near the Toychisay Mountains, South-West Gissar. Kh.Kh. Mirkamalov, M.E. Egamberdyev, 1969 (300, p.63). Stratotype on the western slope of Toychisay, in the Tuybegatan Mountains. Lowermost formation in Tally-Khumon Gr

Synonym: Toychisayskaya Suite, Тойчисайская св., Modified synonym of the Kattakamysh Fm.

Lithology and Thickness

Divided into three parts.

Part 1 - sandy limestones with layers of gray clays

Part 2 - greenish-gray clays with layers of sandy shell rocks and sandstones

Part 3 - gray clays with layers of sandstones, at the top limestones-shell rocks

Thickness 60-120 m.

Lithology Pattern:

Limestone

Relationships and Distribution

Lower contact

It lies conformably on the Akrobat Fm

Upper contact

It is conformably overlain by the Bandikhan Fm.

Regional extent

Corresponds to the lower part of the Kattakamysh Fm (51;190).

GeoJSON

null

Fossils

Part 1 – with marine bivalve mollusks Exogyга ex gr. decussata Goldf., ammonites Stantonoceras guadalupae asiaticum Iljin.

Part 2 – with marine bivalve mollusks Exogyга ex gr decussata Goldf.

Part 3 – with marine bivalve mollusks Fatina akkaptchigensis Bobk., Exogyra ex gr. ostracina Lam.

Age

It belongs to the Santonian.

Age Span:

Beginning stage:

Santonian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

85.70

Ending stage:

Santonian

Fraction up in the ending stage:

0.5

Ending date (Ma):

84.68

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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