Relating to or denoting the Cenomanian stage of the Cretaceous period, roughly 100 million years ago, characterized by particular fossil assemblages.
From Cenoman, an ancient Roman settlement in Normandy, France, where rocks from this geological period were identified. The suffix -ian creates the geological stage name.
The Cenomanian was a sweet spot in Earth history when the planet was warmer, oceans were higher, and dinosaurs were at their peak—it's named after a French town because that's where geologists first identified the rocks.
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