PBDB Timescale

Devonian of Eastern North America

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

F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
W. B. Harland, R. L. Armstrong, A. V. Cox, L. E. Craig, A. G. Smith and D. G. Smith. 1990. A Geologic Time Scale 1989. view
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view

There are 6 timescales which overlap this one. show

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 64 collections

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International Chronostratigraphic Timescale			Devonian of Eastern North America		Devonian Subages
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				20.44
Paleogene	Oligocene	Chattian				23.03
	Oligocene	Rupelian				27.82
	Eocene	Priabonian				33.9
		Bartonian				37.71
		Lutetian				41.2
		Ypresian				47.8
	Paleocene	Thanetian				56
		Selandian				59.2
		Danian				61.6
Cretaceous	Late Cretaceous	Maastrichtian				66
		Campanian				72.1
		Santonian				83.6
		Coniacian				86.3
		Turonian				89.8
		Cenomanian				93.9
	Early Cretaceous	Albian				100.5
		Aptian				113
		Barremian				121.4
		Hauterivian				125.77
		Valanginian				132.6
		Berriasian				139.8
Jurassic	Late Jurassic	Tithonian				145
		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				208.5
		Carnian				227
	Middle Triassic	Ladinian				237
	Middle Triassic	Anisian				242
	Early Triassic	Olenekian				247.2
	Early Triassic	Induan				251.2
Permian	Lopingian	Changhsingian				251.902
	Lopingian	Wuchiapingian				254.14
	Guadalupian	Capitanian				259.51
		Wordian				264.28
		Roadian				266.9
	Cisuralian	Kungurian				273.01
		Artinskian				283.5
		Sakmarian				290.1
		Asselian				293.52
Carboniferous	Pennsylvanian	Gzhelian				298.9
		Kasimovian	303.7
		Moscovian	307
		Bashkirian	315.2
	Mississippian	Serpukhovian	323.2
		Visean	330.9
		Tournaisian	346.7
Devonian	Late Devonian	Famennian	Conewangan/Conneautan/Canadaway	Late Famennian	358.9
				Middle Famennian	365.3 *
				Early Famennian	368.5 *
		Frasnian	West Fallsian/Sonyean	Late Frasnian	372.2
				Middle Frasnian	375.4 *
				Early Frasnian	379.3 *
	Middle Devonian	Givetian	Geneseean/Taghanican/Tioughniogan	Cazenovian	Late Givetian	382.7
					Middle Givetian	383.7 *
					Early Givetian	385.9 *
		Eifelian	Southwoodian		Late Eifelian	387.7
		Eifelian	Southwoodian		Early Eifelian	390.3 *
	Early Devonian	Emsian	Sawkillian/Deer Parkian	Helderbergian	Late Emsian	393.3
		Emsian	Sawkillian/Deer Parkian		Early Emsian	398.3 *
		Pragian			Pragian	407.6
		Lochkovian			Late Lochkovian	410.8
					Middle Lochkovian	412.8 *
					Early Lochkovian	415.6 *
						419.2