PBDB Interval Range

56 - 47.8 Ma

International Chronostratigraphic Timescale			North American Land Mammal Ages	Cenozoic Subepochs
					18.5
Paleogene	Oligocene	Chattian	Arikareean	Late Oligocene	23.03
		Rupelian	Arikareean	Early Oligocene	27.82
			Whitneyan		29.5
			Orellan		31.8
	Eocene	Priabonian	Chadronian	Late Eocene	33.9
		Priabonian	Duchesnean	Late Eocene	37
		Bartonian	Duchesnean	Middle Eocene	37.71
		Bartonian	Uintan		39.7
		Lutetian	Uintan		41.2
		Lutetian	Bridgerian		46.2
		Ypresian	Bridgerian	Early Eocene	47.8
			Wasatchian		50.5
			Clarkforkian		54.9
	Paleocene	Thanetian	Clarkforkian	Late Paleocene	56
		Thanetian	Tiffanian	Late Paleocene	56.2
		Selandian	Tiffanian	Middle Paleocene	59.2
		Selandian	Torrejonian	Middle Paleocene	60.9
		Danian	Torrejonian	Early Paleocene	61.6
		Danian	Puercan	Early Paleocene	63.8
					66