Temirbastau Formation

Temirbastau Fm

Period:

Carboniferous

Age Interval:

Tournaisian, CK3-5, CK6-7

Province:
Chatkal-Kuramin Region

Type Locality and Naming

Along Mt. Temirbasta, western part of the Talas Alatau Range. O.I. Sergunyukova, 1959 (382, p. 54, 63). Stratotype in the city of Temirbastau, upper reaches of the Daubaba River, right tributary of the Mashat River.

Synonym: Temirbastau Suite, Темирбастауcкая св.

Lithology and Thickness

Bedded, sparitic limestones, predominantly clotted-nodular with interlayers of clayey limestones, with numerous traces of mud-eaters. Thickness 200-300m. In the city of Koykebiltau (near the Sastübe railway station), large biogenic reef masses of Tournaisian age, composed of massive, biogenic, organogenic, and organogenic-detrital limestones with abundant and diverse fauna, are attributed to the Temirbastau Fm. Thickness 100-400 m.

Lithology Pattern:

Limestone

Relationships and Distribution

Lower contact

Transgressively overlies the Chavatin Fm, and in some places the Mailikentskaya (syn. Brichmullin Fm)

Upper contact

With unclear relationships, it is overlapped by the Irisuy Fm or Sargardon Fm and is conformable with the Koksuy Fm (460).

Regional extent

Water-divide part of the Talassky Alatau ridge. The upper parts of the masses are replaced and overlapped conformably by bedded limestones of the Taldybulak Fm (439; 457).

GeoJSON

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Fossils

Contains brachiopods Rhytiopora temirensis (Serg.), Athyris angelica Serg., foraminifers - Bisphaera irregularis Dir., Parathurammina suleimanovi Lip.

Age

Brachiopods and foraminifers are characteristic of the lower Tournaisian.

Age Span:

Beginning stage:

Tournaisian

Fraction up in beginning stage:

0.2

Beginning date (Ma):

356.79

Ending stage:

Tournaisian

Fraction up in the ending stage:

0.4

Ending date (Ma):

354.27

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)”