PBDB Timescale

Paleogene Mammal Ages of Asia

The interval definitions in this timescale are derived from the following sources:

J. Meng and M. C. McKenna. 1998. Faunal turnovers of Paleogene mammals from the Mongolian Plateau. Nature 394:364-367 view
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
J. Alroy. 2000. New methods for quantifying macroevolutionary patterns and processes. Paleobiology 26(4):707-733 view

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Interval boundaries marked with * have been interpolated based on the differences between the ages for international timescale boundaries quoted in the source and the currently accepted ages for those boundaries.

This timescale is used in the definition of 54 collections

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International Chronostratigraphic Timescale			Paleogene Mammal Ages of Asia		North American Mammal Subages/Zones
Quaternary	Holocene	Meghalayan						0
		Northgrippian						0.0042
		Greenlandian						0.0082
	Pleistocene	Late Pleistocene			Sheridanian			0.0117
		Chibanian			Sheridanian			0.129
		Chibanian			Cudahyan/Sappan			0.21
		Calabrian			Cudahyan/Sappan			0.774
		Calabrian			Senecan/Rexroadian			1.4
		Gelasian						1.8
Neogene	Pliocene	Piacenzian						2.58
		Zanclean						3.6
		Zanclean			Late Hemphillian/late Early Hemphillian/early Early Hemphillian			4.7
	Miocene	Messinian						5.333
		Tortonian						7.246
		Tortonian			Late Clarendonian/Early Clarendonian			9.4
		Serravallian			Late Clarendonian/Early Clarendonian			11.63
		Serravallian			late Late Barstovian/early Late Barstovian/Early Barstovian			12.5
		Langhian						13.82
		Burdigalian						15.98
					Late Hemingfordian/Early Hemingfordian			16.3
					late Late Arikareean/early Late Arikareean/late Early Arikareean/early Early Arikareean	Harrisonian		18.5
		Aquitanian						20.44
Paleogene	Oligocene	Chattian	Tabenbulakian	Hsandagolian				23.03
						Monroecreekian		23.1 *
						Geringian		24.7 *
		Rupelian	Kekeamuan			Geringian		27.82
		Rupelian	Kekeamuan					29.5
	Eocene	Priabonian	Houldjinian/Ergilian/Ulangochuian		Late Chadronian/Middle Chadronian/Early Chadronian			33.9
		Priabonian	Houldjinian/Ergilian/Ulangochuian					37
		Bartonian	Sharamurunian/Irdinmanhan/Arshantan					37.71
		Bartonian			Late Uintan/Early Uintan			39.7
		Lutetian			Late Uintan/Early Uintan			41.2
		Lutetian			Twinbuttean/Blacksforkian/Gardnerbuttian			46.2
		Ypresian		Bumbanian	Twinbuttean/Blacksforkian/Gardnerbuttian			47.8
					Lostcabinian/Lysitean/Graybullian/Sandcouleean			50.5
							Cf3/Cf2/Cf1	54.9
	Paleocene	Thanetian	Gashatan				Cf3/Cf2/Cf1	56
		Thanetian	Gashatan				Ti6/Ti5/Ti4/Ti3/Ti2/Ti1	56.2
		Selandian					Ti6/Ti5/Ti4/Ti3/Ti2/Ti1	59.2
		Selandian					To3/To2/To1	60.9
		Danian					To3/To2/To1	61.6
		Danian					Pu3/Pu2/Pu1	63.8
								66