PBDB Interval Range

16.3 - 9.4 Ma

International Chronostratigraphic Timescale			North American Land Mammal Ages	North American Mammal Subages/Zones
					1.4
Neogene	Pliocene	Piacenzian	Blancan	Senecan/Rexroadian	2.58
		Zanclean	Blancan	Senecan/Rexroadian	3.6
		Zanclean	Hemphillian	Late Hemphillian/late Early Hemphillian/early Early Hemphillian	4.7
	Miocene	Messinian			5.333
		Tortonian			7.246
		Tortonian	Clarendonian	Late Clarendonian/Early Clarendonian	9.4
		Serravallian	Clarendonian	Late Clarendonian/Early Clarendonian	11.63
		Serravallian	Barstovian	late Late Barstovian/early Late Barstovian/Early Barstovian	12.5
		Langhian			13.82
		Burdigalian			15.98
			Hemingfordian	Late Hemingfordian/Early Hemingfordian	16.3
			Arikareean	late Late Arikareean/early Late Arikareean/late Early Arikareean/early Early Arikareean/Harrisonian	18.5
		Aquitanian	Arikareean		20.45
					23.04 *
					23.1
					29.5