Dzharbulak Formation

Dzharbulak Fm

Period:

Devonian

Age Interval:

Frasnian, CK9c

Province:
Chatkal-Kuramin Region

Type Locality and Naming

Along the river Dzharbulak, Kuramin Ridge. O.I. Sergun'kova, 1965 (457, pp. 91-93, 95). Stratotype Along the river Dzharbulak, the mountains of Kalkanata. Previously described under the name calcareous layers (165; 457).

Synonym: Dzharbulakian Suite, Jarbulak, Джарбулакская св.

Lithology and Thickness

Dolomites and limestones with layers of marls. Thickness 215m.

Lithology Pattern:

Dolomitic limestone

Relationships and Distribution

Lower contact

Conformably overlies the Karamazar-Dev Fm

Upper contact

is conformably overlain by the Umbetin Fm

Regional extent

Kuramin Ridge, the mountains of Kalkanata, Baraktyntau.

GeoJSON

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Fossils

Contains stromatoporoids - Taeniodictyon tschussovense Yavor,, Trupetostroma">Trupetostroma bassleri Lec., T. turkestanica (Ikon.), Clathrocoilona crassitexta (Lec.); conodonts - Polygnathus pacificus Savage et Funai, P. alatus Hudd., P. xylus xylus Stauff., P. aequalis Lane et Klapp

Age

Fossil data characterizes the Frasnian age

Age Span:

Beginning stage:

Frasnian

Fraction up in beginning stage:

0.4

Beginning date (Ma):

375.78

Ending stage:

Frasnian

Fraction up in the ending stage:

0.6

Ending date (Ma):

374.22

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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