Baraktyn Formation

Baraktyn Fm

Period:

Devonian

Age Interval:

Upper Devonian (Famennian), CK9c

Province:
Chatkal-Kuramin Region

Type Locality and Naming

After Mount Baraktyntau, Kuramin Range. O.I. Sergun'kova, 1965 (457, p.85, 93). Earlier (382) it was described by O.I. Sergun'kova under the name "aquilinus layers," and in 1965 as the Baraktyn Fm. In Strat. Sl. (441) it is described under the name Baraktyn Fm.

Synonym: Baraktynskaya Suite, Барактынская св.

Lithology and Thickness

In the lower part, light-gray, fine-clastic limestones with pebble inclusions of underlying rocks, in the upper part - gray, fine-grained limestones. Thickness 217-330 m.

Lithology Pattern:

Limestone

Relationships and Distribution

Lower contact

Transgressively overlies the Dzharbulak Fm

Upper contact

Conformably overlain by the Dalverzin Fm, and Along I.M. Nigmadzhanov, the Aktash Fm

Regional extent

Kuramin Range, Mounts Kalkanata, Baraktyntau.

GeoJSON

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Fossils

Contains Famennian brachiopods - Plicatifera praelonga Sow., P. vlagalii Rom., Comarotoechia boloniensis Orb., C. turanica Rom., C. deprati Man., Cyrtospirifer aquilinus Rom.

Age

Age - Famennian epoch (166; 457). I.A. Bardyshev, based on conodonts, assigns the Baraktyn Fm and its analogs to the Frasnian stage (165).

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:

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)”