The Duchesnean North American Stage on the geologic timescale is a North American Land Mammal Age (NALMA), with an age from 42 to 38 million years BP, representing . It falls within the Eocene epoch. The Duchesnean is preceded by the Uintan and followed by the Chadronian NALMA.
|Paleocene Epoch||Eocene Epoch||Oligocene Epoch|
|Danian | Selandian
|Ypresian | Lutetian
|Rupelian | Chattian|