The Paleobiology Database

ammonites

North American Mammal Ages

Interval	Maximum correlate	Minimum correlate	Ma

Rancholabrean	Middle Pleistocene	Late/Upper Pleistocene
			0.3

Irvingtonian	Early/Lower Pleistocene	Middle Pleistocene
			1.8

Blancan	Pliocene
			4.5

Hemphillian	Miocene
			8.2

Clarendonian	Miocene
			11.6

Barstovian	Miocene
			16.5

Hemingfordian	Miocene
			20

Arikareean	Oligocene	Miocene
			29

Whitneyan	Oligocene
			30.7

Orellan	Oligocene
			32.4

Chadronian	Oligocene
			38

Duchesnean	Eocene
			42

Uintan	Eocene
			48

Bridgerian	Eocene
			51

Wasatchian	Eocene
			57.3

Clarkforkian	Paleocene	Eocene
			58.8

Tiffanian	Paleocene
			62.8

Torrejonian	Paleocene
			65

Puercan	Paleocene
			66.5

Authorizer: J. Alroy Enterer: J. Alroy

Continent: North America Rank of each interval: age/stage

Basis of scale: paleontological

Reference: M. O. Woodburne 1987

View another time scale