PBDB Interval

54.9 - 50.5 Ma

The definition of this interval in the timescale North American Mammal Subages/Zones is taken from the following source:

M. O. Woodburne. 1987. A prospectus of the North American Mammal Ages. In: Woodburne, M. O. (ed.), Cenozoic Mammals of North America. University of California Press, Berkelery, CA 285-290 view

There are intervals in 8 timescales which overlap this one. show

This interval is used in the definition of 68 collections

A total of 3659 collections with 31162 occurrences lie within this time span

International Chronostratigraphic Timescale			North American Mammal Subages/Zones			South American Land Mammal Ages
							18.5
							20.9
Paleogene	Oligocene	Chattian	late Late Arikareean/early Late Arikareean/late Early Arikareean/early Early Arikareean	Harrisonian		Deseadan	23.03 *
				Monroecreekian			23.1 *
				Geringian			24.7 *
		Rupelian					27.82
						Tinguirirican	28.9 *
							29.5
	Eocene	Priabonian	Late Chadronian/Middle Chadronian/Early Chadronian				33.9
			Late Chadronian/Middle Chadronian/Early Chadronian			Divisaderan	35.9 *
							37
		Bartonian					37.71
		Bartonian	Late Uintan/Early Uintan				39.7
		Lutetian					41.2
						Mustersan	41.9 *
			Twinbuttean/Blacksforkian/Gardnerbuttian				46.2
		Ypresian					47.8
						Casamayoran	47.9 *
			Lostcabinian/Lysitean/Graybullian/Sandcouleean				50.5
					Cf3/Cf2/Cf1		54.9
	Paleocene	Thanetian			Cf3/Cf2/Cf1	Riochican	56
					Ti6/Ti5/Ti4/Ti3/Ti2/Ti1	Riochican	56.2
						Itaboraian	56.9 *
						Peligran	58.9 *
		Selandian					59.2
		Selandian			To3/To2/To1		60.9
		Danian					61.6
						Tiupampan	62.4 *
					Pu3/Pu2/Pu1	Tiupampan	63.8
							66