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 1 collections

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

International Chronostratigraphic Timescale			North American Mammal Subages/Zones			Cenozoic Subepochs
							18.5
Paleogene	Oligocene	Chattian	late Late Arikareean/early Late Arikareean/late Early Arikareean/early Early Arikareean	Harrisonian		Late Oligocene	23.03
				Monroecreekian			23.1 *
				Geringian			24.7 *
		Rupelian		Geringian		Early Oligocene	27.82
		Rupelian				Early Oligocene	29.5
	Eocene	Priabonian	Late Chadronian/Middle Chadronian/Early Chadronian			Late Eocene	33.9
		Priabonian				Late Eocene	37
		Bartonian				Middle Eocene	37.71
		Bartonian	Late Uintan/Early Uintan				39.7
		Lutetian	Late Uintan/Early Uintan				41.2
		Lutetian	Twinbuttean/Blacksforkian/Gardnerbuttian				46.2
		Ypresian	Twinbuttean/Blacksforkian/Gardnerbuttian			Early Eocene	47.8
			Lostcabinian/Lysitean/Graybullian/Sandcouleean				50.5
					Cf3/Cf2/Cf1		54.9
	Paleocene	Thanetian			Cf3/Cf2/Cf1	Late Paleocene	56
		Thanetian			Ti6/Ti5/Ti4/Ti3/Ti2/Ti1	Late Paleocene	56.2
		Selandian			Ti6/Ti5/Ti4/Ti3/Ti2/Ti1	Middle Paleocene	59.2
		Selandian			To3/To2/To1	Middle Paleocene	60.9
		Danian			To3/To2/To1	Early Paleocene	61.6
		Danian			Pu3/Pu2/Pu1	Early Paleocene	63.8
							66