Duchesnean
North American faunal stage
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The Duchesnean North American Stage on the geologic timescale is a North American Land Mammal Age (NALMA), with an age from 42,000,000 to 38,000,000 years before present BP, representing 4 million years.[1] It cascade inside the Eocene era. The Duchesnean is preceded by the Uintan and followed by the Chadronian NALMA.
The Duchesnean cataract inside the Bartonian age of the geologic timescale.
