Changyrtash Fm
Period:
Cretaceous
Age Interval:
Upper Cretaceous (Campanian), F9d
Province:
Fergana
Type Locality and Naming
Along the Changyrtash Range, S. Fergana. A.G. Babaev, 1954 (82, p.38-39). Stratotype - Changyrtash section.
Synonym: Changyrtash Suite, Чангырташская св.
Lithology and Thickness
Limestones with layers of clays and dolomites. Thickness 4-50m.
Lithology Pattern:
Limestone
Relationships and Distribution
Lower contact
Lies conformably on the Tekebel Fm
Upper contact
is overlain by the Sarytok Fm
Regional extent
W., S., and SE. Fergana. Corresponds to the layer with Lopha falcata (154; 361; 416; 417; 464). S.V. Lobacheva". Strat. sect. (446).
GeoJSON
null
Fossils
Contains ammonites Hoplitoplacenticeras marroti Coq.; marine bivalve mollusks - Lopha falcata Mort., Gyropleura magianensis Pojark., Biradiolites postfissicostatus minor Pojark., B. coquandi Toucas.
Age
Belongs to the Upper Campanian
Age Span:
Beginning stage:
Campanian
Fraction up in beginning stage:
0.8
Beginning date (Ma):
74.47
Ending stage:
Campanian
Fraction up in the ending stage:
1.0
Ending date (Ma):
72.17
Depositional setting
Depositional pattern:
Additional Information
Compiler:
A.M. Bogomolova – In: GeoGPT translation of: ”Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian)"