Dalverzin Fm
Period:
Carboniferous
Age Interval:
Tournaisian, CK9c
Province:
Chatkal-Kuramin Region
Type Locality and Naming
In the Dalverzin steppe, Mount Baraktyntau, Kuramin Range. O.I.Sergunyukova, 1965 (457, p.93). Previously distinguished under the name of Cyrtospirifer layers of the upper Famennian substage.
Synonym:
Lithology and Thickness
Dark gray, thin-bedded, fine-grained dolomitized limestones. Thickness 165m.
Lithology Pattern:
Dolomitic limestone
Relationships and Distribution
Lower contact
Conformably overlies the Baraktyn Fm
Upper contact
Upper contact unclear.
Regional extent
Kuramin Range.
GeoJSON
null
Fossils
Contains brachiopods - Camarotoechia mitcheldeanensis Vaugh., Cyrtospirifer kickinensis Serg. (166).
Age
With the transfer of the Kokterek suite, which is considered an age analogue of the Cyrtospirifer layers, to the base of the Carboniferous, the age of these layers is also established as Lower Carboniferous (457). Belongs to the Lower Carboniferous, Tournaisian stage.
Age Span:
Beginning stage:
Tournaisian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
359.30
Ending stage:
Tournaisian
Fraction up in the ending stage:
1.0
Ending date (Ma):
346.73
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)”