North American Land Mammal Ages
9International timescale
Quaternary
Holocene
Greenlandian
Pleistocene
Late Pleistocene
Chibanian
Calabrian
Gelasian
Neogene
Pliocene
Piacenzian
Zanclean
Miocene
Messinian
Tortonian
Serravallian
Langhian
Burdigalian
Aquitanian
Paleogene
Oligocene
Chattian
Rupelian
Eocene
Priabonian
Lutetian
Ypresian
Paleocene
Thanetian
Selandian
Danian
Cretaceous
Late Cretaceous
Maastrichtian
North American Land Mammal Ages
Rancholabrean
Irvingtonian
Blancan
Hemphillian
Clarendonian
Hemingfordian
Arikareean
Whitneyan
Orellan
Chadronian
Duchesnean
Uintan
Bridgerian
Wasatchian
Clarkforkian
Tiffanian
Torrejonian
Puercan
