Type
Age
Age range
47.9–39.9 Ma

International Timescale

Eocene
Bartonian
Lutetian
Ypresian

North American Land Mammal Ages

Duchesnean
Uintan
Bridgerian

North American Regional

Duchesnean
Uintan
Bridgerian
4848474746464545444443434242414140

Macrostrat

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