PBDB Interval Range

29.5 - 12.5 Ma

International Chronostratigraphic Timescale			North American Land Mammal Ages
Quaternary	Holocene	Meghalayan	Saintaugustinean	0
		Meghalayan	Santarosean	0.0004
		Northgrippian		0.0042
		Greenlandian		0.0082
	Pleistocene	Late Pleistocene		0.0117
		Late Pleistocene	Rancholabrean	0.014
		Chibanian	Rancholabrean	0.129
		Chibanian	Irvingtonian	0.21
		Calabrian	Irvingtonian	0.774
		Calabrian	Blancan	1.4
		Gelasian		1.8
Neogene	Pliocene	Piacenzian		2.58
		Zanclean		3.6
		Zanclean	Hemphillian	4.7
	Miocene	Messinian		5.333
		Tortonian		7.246
		Tortonian	Clarendonian	9.4
		Serravallian	Clarendonian	11.63
		Serravallian	Barstovian	12.5
		Langhian		13.82
		Burdigalian		15.98
			Hemingfordian	16.3
			Arikareean	18.5
		Aquitanian	Arikareean	20.44
				23.03
				29.5