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

Maizak Formation

Maizak Fm

Period:

Devonian

Age Interval:

Pragian-Emsian, Z5

Province:
Zarafshan-N.Gissar

Type Locality and Naming

Named after the Maysak, Zirabulak-Ziaetdin Mountains. S.K. Piven' et

Synonym: Mayzakskaya Formation, Майзакская св.

Lithology and Thickness

Divided into two sub-suites:

Upper - dolomitic limestones, slightly siliceous, massive and layered. Thickness 210m.

Lower - dark gray to black layered limestones with pinkish clayey material. Thickness 230m.

Lithology Pattern:

Dolomitic limestone

Relationships and Distribution

Lower contact

Lower boundary stratigraphically conformable with the Dzhalkyr-Aymakhal Fm.

Upper contact

Overlain by a sequence of variably grained massive limestones with lenticular layers and nodules of early Emsian cherts.

Regional extent

Zirabulak-Ziaetdin Mountains, southwestern part of the Terikbaba Mountains, upper reaches of the Yarmanchi River basin.

GeoJSON

null

Fossils

Upper – Contains tabulates - Favosites sp. (cf. praeplacenta Dubat.), F. sp. (cf. oblongus Rukh.), F. cf. suspectus Dubat., F. ex gr. tomensis Mir., F. cf. finitimus Yanet.; conodonts - Polygnatus sp.

Lower – Contains conodonts - Ozarkodina sp. (cf. repetitor Caris et Gandl.), O. cf. typica denkmanni Ziegl.

Age

early Devonian, late Pragian-Emsian time

Age Span:

Beginning stage:

Pragian

Fraction up in beginning stage:

0.5

Beginning date (Ma):

411.46

Ending stage:

Emsian

Fraction up in the ending stage:

1.0

Ending date (Ma):

394.30

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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