Cenomanian Stage

Cenomanian Stage

 

the first stage from the bottom in the upper division of the Cretaceous system. The Cenomanian was first identified by the French geologist A. d’Orbigny in central France in 1847. At the type locality, near the city of Le Mans, it is represented by sands, clays, and marls containing abundant fossil shells of mollusks and foraminifers. The stage is widely represented in the USSR.

References in periodicals archive ?
These are hard-to-recover reserves, which lie above the Cenomanian stage, usually at depths of 810-840 metres.
The Cenomanian stage was established in the lower part of the Nkalagu Formation based on the co-occurrence of Rotalipora balenaensis and Globigerinelloides caseyi [28].
18]O values from the Cenomanian Stage of the Cretaceous Western Interior Basin (KWIB) suggest that precipitation and evaporation fluxes were greater than that of the present.