Kulbatin Formation

Kulbatin Fm

Period:

Devonian

Age Interval:

Famennian, CK9-9a

Province:
Chatkal-Kuramin Region

Type Locality and Naming

Named after Lake Kulyata, left bank of the Karakii River, Kuramin Range. Zh.N. Kuznetsov et al., 1964.

Synonym: Kulyatinskaya Suite, Кулбатинская св.

Lithology and Thickness

Thin-bedded ribbon dolomites. Bedding is emphasized by the alternation of light gray and dark gray layers. A characteristic feature is the presence of sedimentary breccias of landslide origin. The largest amount of these breccias is noted in the Sukok-Zarkent Massif, where they form a significant part of the suite's section, as well as in the lower reaches of the Karakii River and in the Karatagata Mountain in the Almalyk District. In the central block of the Almalyk District, the suite has lead-zinc mineralization. Thickness 200-400m.

Lithology Pattern:

Dolomite

Relationships and Distribution

Lower contact

Conformably overlies the Kalkanatin-Dev Fm

Upper contact

It is overlain with erosion by the Saukbulak Fm and Tutbulak Fm

Regional extent

Kuramin Range, Kalkanata Mountain, Altyntopkan Ridge, Almalyk District, Sukok-Zarkent Massif. Some researchers (A.S. Makarova, I.M. Nigmadzhanov) distinguish the part of the section with sedimentary breccias in the Sukok-Zarkent Massif as the Sukok Fm.

GeoJSON

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Fossils

Contains rare foraminifers Archaesphaera minima Sul., Paratirammina cf. algae Sul., Bisphaera malevkensis Bir., Thurammina sp., and others of a wide age range from the Upper Devonian to the Lower Carboniferous; undetermined stromatoporoids; charophyte algae Umbella sp.; ostracods.

Age

Belongs to the Famennian stage of the Upper Devonian (460).

Age Span:

Beginning stage:

Famennian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

371.10

Ending stage:

Famennian

Fraction up in the ending stage:

1.0

Ending date (Ma):

359.30

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)”