PBDB Interval Range

Trempealeauan age - Skullrockian age

490.2 - 483.4 Ma

International Chronostratigraphic Timescale			Cambrian of Britain		Ordovician of North America
Quaternary	Holocene	Meghalayan								0
		Northgrippian								0.0042
		Greenlandian								0.0082
	Pleistocene	Late Pleistocene								0.0117
		Chibanian								0.129
		Calabrian								0.774
		Gelasian								1.8
Neogene	Pliocene	Piacenzian								2.58
	Pliocene	Zanclean								3.6
	Miocene	Messinian								5.333
		Tortonian								7.246
		Serravallian								11.63
		Langhian								13.82
		Burdigalian								15.98
		Aquitanian								20.45
Paleogene	Oligocene	Chattian								23.04
	Oligocene	Rupelian								27.3
	Eocene	Priabonian								33.9
		Bartonian								37.71
		Lutetian								41.03
		Ypresian								48.07
	Paleocene	Thanetian								56
		Selandian								59.24
		Danian								61.66
Cretaceous	Late Cretaceous	Maastrichtian								66
		Campanian								72.2
		Santonian								83.6
		Coniacian								85.7
		Turonian								89.8
		Cenomanian								93.9
	Early Cretaceous	Albian								100.5
		Aptian								113.2
		Barremian								121.4
		Hauterivian								125.77
		Valanginian								132.6
		Berriasian								137.05
Jurassic	Late Jurassic	Tithonian								143.1
		Kimmeridgian								149.2
		Oxfordian								154.8
	Middle Jurassic	Callovian								161.5
		Bathonian								165.3
		Bajocian								168.2
		Aalenian								170.9
	Early Jurassic	Toarcian								174.7
		Pliensbachian								184.2
		Sinemurian								192.9
		Hettangian								199.5
Triassic	Late Triassic	Rhaetian								201.4
		Norian								205.7
		Carnian								227.3
	Middle Triassic	Ladinian								237
	Middle Triassic	Anisian								241.464
	Early Triassic	Olenekian								246.7
	Early Triassic	Induan								249.9
Permian	Lopingian	Changhsingian								251.902
	Lopingian	Wuchiapingian								254.14
	Guadalupian	Capitanian								259.51
		Wordian								264.28
		Roadian								266.9
	Cisuralian	Kungurian								274.4
		Artinskian								283.3
		Sakmarian								290.1
		Asselian								293.52
Carboniferous	Pennsylvanian	Gzhelian								298.9
		Kasimovian	303.7
		Moscovian	307
		Bashkirian	315.2
	Mississippian	Serpukhovian	323.4
		Visean	330.3
		Tournaisian	346.7
Devonian	Late Devonian	Famennian	358.86
	Late Devonian	Frasnian	372.15
	Middle Devonian	Givetian	382.31
	Middle Devonian	Eifelian	387.95
	Early Devonian	Emsian	393.47
		Pragian	410.62
		Lochkovian	413.02
Silurian	Pridoli		419.62
	Ludlow	Ludfordian	422.7
	Ludlow	Gorstian	425
	Wenlock	Homerian	426.7
	Wenlock	Sheinwoodian	430.6
	Llandovery	Telychian	432.9
		Aeronian	438.6
		Rhuddanian	440.5
Ordovician	Late Ordovician	Hirnantian	Cincinnatian	Gamachian	443.1
		Katian		Gamachian	445.2
				Richmondian	445.5
				Maysvillian	Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian	449.6
				Edenian		450.2
			Mohawkian	Chatfieldian		451
		Sandbian		Chatfieldian		452.8
				Turinian		453.8
			Whiterockian		Canadian †	Chazyan †/Marmor	457.3
	Middle Ordovician	Darriwilian					458.2
		Dapingian					469.4
		Dapingian		Rangerian			470.3
	Early Ordovician	Floian	Ibexian	Blackhillsian		Jeffersonian †	Cassinian †	471.3
		Floian		Tulean				475.3 *
		Tremadocian		Tulean				477.1
				Stairsian				481.7 *
				Skullrockian			Demingian †	483.4 *
Cambrian	Furongian	Stage 10		Skullrockian	Merioneth	Dolgellian/Trempealeauan			486.85
						Dolgellian/Trempealeauan			488.9 *
						Festiniogian			490.2 *
		Jiangshanian				Festiniogian			491
		Jiangshanian				Maentwrogian			493.6 *
		Paibian				Maentwrogian			494.2
	Miaolingian	Guzhangian			St Davids				497
		Drumian							500.5
		Wuliuan							504.5
	Series 2	Stage 4			Caerfai				506.5
	Series 2	Stage 3							514.5
	Terreneuvian	Stage 2							521
	Terreneuvian	Fortunian							529
										538.8