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

Urmitan Formation

Urmitan Fm

Period:

Carboniferous

Age Interval:

lower Moscovian, Z3

Province:
Zarafshan-N.Gissar

Type Locality and Naming

Along the Urmitan Ridge, Zarafshan-Gissar mountain region. V.D. Saltovskaya in 1959 (460, p. 184). Stratotype in the Snowy stream, right tributary of the Kyzyl-Kul River.

Synonym: Urmitan Suite, Урмитанская св.

Lithology and Thickness

Thin-bedded, massive and flaggy limestones with remnants of foraminifers (fusulinid limestones) with rare layers of siltstone (aleurolites) and sandstones, laterites and bauxites are noted. Thickness up to 100 m.

Lithology Pattern:

Limestone

Relationships and Distribution

Lower contact

Lies transgressively on the Oybadam-Dev Fm limestones

Upper contact

It is unconformably overlain by the Obizard Fm.

Regional extent

Chumkartau Mountains, Zaraufshan River valley.

GeoJSON

null

Fossils

Contains algae - Avinella comata Chvor., Beressella erecta Masl. et Kul., B. transluces Kul., Samarella setosa Masl. et Kul.; foraminifers - Tuberitina collosa Reitl., Eostaffella aff. exilis Leb., Seminovella carbonica Leb. et Grozd., Ozawainella cf. pararhomboidalis Man., Ammodiscus multivolutus Reitl.; brachiopods - Linoproductus latiplanus Jv. et al.

Age

Age is established by fauna as early Moscovian. On the State Geol Map-500 of Uzbekistan (460) - late Bashkirian-early Moscovian age, which was previously assigned by D.A. Starshinina on the State Geol Map-500, 1984.

Age Span:

Beginning stage:

Moscovian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

315.15

Ending stage:

Moscovian

Fraction up in the ending stage:

0.5

Ending date (Ma):

311.09

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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