Sultanbibi Formation

Sultanbibi Fm

Period:

Devonian

Age Interval:

Emsian, K9

Province:
Kyzylkum Region

Type Locality and Naming

By the village of Sultanbibi, Kuldjuktau mountains, Central Kyzylkum. Y.B. Aysanov, A.I. Egorov et al., 1984.

Synonym: Sultanbibi Suite, Султанбибинская св.

Lithology and Thickness

Central Kyzylkum, Kuldjuktau mountains.

Divided into two packages.

Upper (Thickness 350m) black dolomites, dolomitized and crinoidal limestones with lenticular layers of siliceous rocks and finely laminated limestones.

Lower (Thickness 150m) - dark-gray, black limestones, dolomites with lenticular layers of crinoidal limestones and siliceous rocks.

Total thickness 500m.

Lithology Pattern:

Dolomitic limestone

Relationships and Distribution

Lower contact

Conformably overlies the Turkmentau Fm

Upper contact

It is unconformably overlain by the Arap-Kazgan Fm (Arankazgan Fm) (Aysanov et al., 1984; 165).

Regional extent

GeoJSON

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Fossils

Tabulates - Favosites cf. regularissimus Yanet., F. goldfussi Orb., F. cf. ottiliae Penecke, F. cf. proplacenta Dubat.; rugosans - Iryplasma devoniana Soshk., brachiopods - Theodossia cf. karmanovi Khed., Atrypa cf. subalensis Nikif., A. cf. devoniana Webster, Carinatina cf. arimaspa Eichw.; stromatoporoids - Amphipora cf ramosa minor Riab., Actinostroma">Actinostroma sp., Atellodictyon ex gr. rarus Bog. and others; crinoids - Cyclocyclicus laticanalis Yelt., C. ex gr. carinatus Yelt., Cupressocrinites romboidalis Milicina and others.

Age

Middle Devonian age is established by tabulates. On the State Geological Map-500 of Uzbekistan (460), it is assigned to the Eifelian of the Middle Devonian.

Age Span:

Beginning stage:

Eifelian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

394.30

Ending stage:

Eifelian

Fraction up in the ending stage:

0.5

Ending date (Ma):

389.80

Depositional setting

Depositional pattern:

Additional Information

Compiler:

Z.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)”