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Cenomanian Stage
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A chart showing the Cretaceous period of the Mesozoic era on the geologic time scale, listing its division into Upper and Lower epochs, with stages such as Maastrichtian, Campanian, and Berriasian, and corresponding ages in millions of years ago. A detailed geologic time scale chart displaying Earth's history from the Hadean Eon over 4.5 billion years ago to the present, organized by eons, eras, periods, epochs, and ages with color-coded columns and corresponding dates in millions of years.
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Cretaceous Period in geologic time
Cretaceous Period in geologic time The Cretaceous Period and its subdivisions.

Cenomanian Stage

stratigraphy
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Cenomanian Stage, first of six main divisions (in ascending order) in the Upper Cretaceous Series, representing rocks deposited worldwide during the Cenomanian Age, which occurred 100.5 million to 93.9 million years ago during the Cretaceous Period. Rocks of the Cenomanian Stage overlie those of the Albian Stage and underlie rocks of the Turonian Stage.

The name for this stage is derived from Cenomanum, the Roman name for Le Mans in northwestern France. The Cenomanian has been divided into several biozones representing shorter spans of time and characterized by fossil ammonite genera that are used as index fossils.

This article was most recently revised and updated by John P. Rafferty.