PBDB Interval Range

72.2 - 63.8 Ma

International Chronostratigraphic Timescale			Mesozoic Subages	North American Land Mammal Ages
					18.5
Paleogene	Oligocene	Chattian		Arikareean	23.04
		Rupelian		Arikareean	27.3
				Whitneyan	29.5
				Orellan	31.8
	Eocene	Priabonian		Chadronian	33.9
		Priabonian		Duchesnean	37
		Bartonian		Duchesnean	37.71
		Bartonian		Uintan	39.7
		Lutetian		Uintan	41.03
		Lutetian		Bridgerian	46.2
		Ypresian		Bridgerian	48.07
				Wasatchian	50.5
				Clarkforkian	54.9
	Paleocene	Thanetian		Clarkforkian	56
		Thanetian		Tiffanian	56.2
		Selandian		Tiffanian	59.24
		Selandian		Torrejonian	60.9
		Danian		Torrejonian	61.66
		Danian		Puercan	63.8
Cretaceous	Late Cretaceous	Maastrichtian	Late Maastrichtian/Early Maastrichtian		66
		Campanian	Late Campanian/Middle Campanian/Early Campanian		72.2
		Santonian	Late Santonian/Middle Santonian/Early Santonian		83.6
		Coniacian	Late Coniacian/Middle Coniacian/Early Coniacian		85.7
		Turonian	Late Turonian/Middle Turonian/Early Turonian		89.8
		Cenomanian	Late Cenomanian/Middle Cenomanian/Early Cenomanian		93.9
	Early Cretaceous	Albian	Late Albian		100.5
			Middle Albian		106.3 *
			Early Albian		110.1 *
		Aptian	Late Aptian		113.2
		Aptian	Early Aptian		119.57 *
		Barremian	Late Barremian/Early Barremian		121.4
		Hauterivian	Late Hauterivian/Early Hauterivian		125.77
		Valanginian	Late Valanginian/Early Valanginian		132.6
		Berriasian	Late Berriasian		137.05
			Middle Berriasian		139.1 *
			Early Berriasian		141 *
					143.1