Aravan Fm
Period:
Cretaceous
Age Interval:
Lower Cretaceous (middle Aptian- middle Albian), F9e
Province:
Fergana
Type Locality and Naming
Along the Aavan River, Fergana. 3.N. Poyarkova, 1969 (361, p. 110). Stratotype on the right bank of the Aavan River, north of the village of Iski-Naukat.
Synonym: Aravan Suite, Араванская св.
Lithology and Thickness
Sandstones and clays with ripple marks. Thickness 30-100m.
Lithology Pattern:
Clayey sandstone
Relationships and Distribution
Lower contact
Conformably overlies the Khodzhaosman Fm
Upper contact
Conformably overlain by the Iskinaukat-Cret Fm
Regional extent
Naukat Basin, South-Eastern Fergana.
GeoJSON
null
Fossils
Contains freshwater gastropods - Bithynia kuvasaica Zharn., Physa naucatica Zharn.; freshwater ostracods - Cypridea cylia Gramm.
Age
Belongs to the middle Aptian - middle Albian; in the Stratigraphic Table (446) - to the Albian. (361; 446; 452).
Age Span:
Beginning stage:
Aptian
Fraction up in beginning stage:
0.5
Beginning date (Ma):
117.30
Ending stage:
Albian
Fraction up in the ending stage:
0.4
Ending date (Ma):
108.12
Depositional setting
Depositional pattern:
Additional Information
Compiler:
I.M. Abdurazimova – In: GeoGPT translation of: ”Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian)"