Turkmentau Formation

Turkmentau Fm

Period:

Devonian

Age Interval:

Lochkovian-Pragian, K9

Province:
Kyzylkum Region

Type Locality and Naming

In the mountains of Turkmenatau, Kuldzhuktau, Central Kyzylkum. Ya.B. Aysanov et al., 1984.

Synonym: Turkmenatau Suite, Туркментауская св.

Lithology and Thickness

Black and dark-gray limestones at the base of the section; Middle part is white, light-gray, and mottled limestones with dolomite interlayers; Capped by a characteristic layer of "patterned" fragmental limestones of light-gray color. Thickness 400-700m.

Lithology Pattern:

Limestone

Relationships and Distribution

Lower contact

Conformably overlies the Bashguzumdin Fm

Upper contact

Conformably overlain by the Sultanbibi Fm (Aysanov et al., 1984; 165; 460).

Regional extent

In the form of isolated outcrops throughout the area of the Kuldzhuktau Mountains (Bashguzumdy, Taushan, Sultanbibi, Aktosty, southeast of the city of Darvaza, southern slope of Beltau).

GeoJSON

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Fossils

Contains brachiopods - Gypidula integra Barr., G. ex gr. pelagica Barr., Leptaena rhomboidalis Wilck., Spirigerina supramarginalis Khalf. and others; tabulates Favosites cf. acrospinosus Dubat., F. cf. brusnitzini Peetz., F. cf. nikiforovae Chekh., F. ex gr. socialis Sok. et Tes., Pachyfavosites ex gr. kozlovskii Sok. and others; crinoids Pentagonocyclicus cf. multibifidus Yelt., Cyclocyclicus latus Yelt.; stromatoporoids Simplexodictyon ex gr. primordium Yavor., Syringostromella sp., characterizing the Lochkovian-Pragian age of the Devonian.

Age

Age Span:

Beginning stage:

Lochkovian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

419.00

Ending stage:

Emsian

Fraction up in the ending stage:

1.0

Ending date (Ma):

394.30

Depositional setting

Depositional pattern:

Additional Information

Compiler:

Z.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)”