Taldybulak Formation

Taldybulak Fm

Period:

Carboniferous

Age Interval:

Tournaisian, CK3-5, CK6

Province:
Chatkal-Kuramin Region

Type Locality and Naming

By the river Taldybulak, western part of the Talas Alatau ridge. O.I. Sergun'kova, 1959 (382, p. 55). Stratotype in the upper reaches of the Taldybulak river, northern slope of the watershed of the Irysu-Taldybulak rivers. Upper formation in Chatkal Gr.

Synonym: Taldybulakskaya Suite, Талдыбулакская св.

Lithology and Thickness

Gray, medium-bedded, bio- and pel-sparitic limestones, locally with layers of shell rocks and siliceous inclusions (up to 10%) in the form of nodules and small lenses. Thickness 130-370m.

Lithology Pattern:

Limestone

Relationships and Distribution

Lower contact

Overlies the Koksuy Fm conformably

Upper contact

Overlain by the the Sargardon Fm in the Pskem and Ugam Ranges, and the Irisuy Fm in the Talas Alatau Range.

Regional extent

Ugam, Pskem, Koksuy ridges, southwestern spurs of the Talas Alatau ridge.

GeoJSON

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Fossils

Contains foraminifera - Paraendothyra tshikmanica (Mal.), Lipinellina chatkalica (Mich.), Endothyra turkestanica (B. et Y); brachiopods - Rhipidomella altaica Tolm., Rugosochonetes hardrensis (Kon.), Composita megala Tolm

Age

The formation's age is determined to be late Tournaisian (439; 457; Tkachev et al., 1992f, 1996f).

Age Span:

Beginning stage:

Tournaisian

Fraction up in beginning stage:

0.8

Beginning date (Ma):

349.24

Ending stage:

Visean

Fraction up in the ending stage:

0.1

Ending date (Ma):

345.09

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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