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Adapted from 'A Geologic Time Scale 2004 (inc 2008 revisions) by F. Gradstein, J. Ogg and A. Smith' (available to purchase at www.amazon.co.uk).

Eon	Era	Period	Epoch	Stage	Base age (mya)	Featured locations
P H A N E R O Z O I C	C A E N O Z O I C	Q U A T E R N A R Y N E O G E N E	Holocene	-	0.0117
			Pleistocene	Late / Upper	0.126
				Middle	0.781
				Early / Lower	1.806
			Pliocene	Gelasian	2.588
				Piacenzian	3.600	Walton-on-the-Naze
				Zanclean	5.332
			Miocene	Messinian	7.246
				Tortonian	11.608
				Serravallian	13.82
				Langhian	15.97
				Burdigalian	20.43
				Aquitanian	23.03
		P A L A E O G E N E	Oligocene	Chattian	28.4 ± 0.1
				Rupelian	33.9 ± 0.1	Bouldnor
			Eocene	Priabonian	37.2 ± 0.1	Alum Bay
				Bartonian	40.4 ± 0.2	Alum Bay Barton on Sea
				Lutetian	48.6 ± 0.2	Alum Bay Bracklesham Bay
				Ypresian	55.8 ± 0.2	Alum Bay Herne Bay Isle of Sheppey Walton-on-the-Naze
			Palaeocene	Thanetian	58.7 ± 0.2	Herne Bay
				Selandian	61.7 ± 0.2
				Danian	65.5 ± 0.3
	M E S O Z O I C	C R E T A C E O U S	Late / Upper	Maastrichtian	70.6 ± 0.6
				Campanian	83.5 ± 0.7	Peacehaven
				Santonian	85.8 ± 0.7	Peacehaven Seaford Seven Sisters
				Coniacian	89.3 ± 1.0	Seaford Seven Sisters
				Turonian	93.6 ± 0.8	Beachy Head Dover
				Cenomanian	99.6 ± 0.9	Beachy Head Hunstanton
			Early / Lower	Albian	112.0 ± 1.0	Beachy Head Folkestone Hunstanton
				Aptian	125.0 ± 1.0
				Barremian	130.0 ± 1.5	Hanover Point
				Hauterivian	136.4 ± 2.0
				Valanginian	140.2 ± 3.0
				Berriasian	145.5 ± 4.0	Durlston Bay Hastings
		J U R A S S I C	Late / Upper	Tithonian	150.8 ± 4.0	Kimmeridge
				Kimmeridgian	155.7 ± 4.0	Kimmeridge
				Oxfordian	161.2 ± 4.0
			Middle	Callovian	164.7 ± 4.0	Brora River
				Bathonian	167.7 ± 3.5
				Bajocian	171.6 ± 3.0
				Aalenian	175.6 ± 2.0
			Early / Lower	Toarcian	183.0 ± 1.5
				Pliensbachian	189.6 ± 1.5	Charmouth Lyme Regis Seatown
				Sinemurian	196.5 ± 1.0	Charmouth Dunrobin Lyme Regis
				Hettangian	199.6 ± 0.6
		T R I A S S I C	Late / Upper	Rhaetian	203.6 ± 1.5
				Norian	216.5 ± 2.0
				Carnian	228.0 ± 2.0
			Middle	Ladinian	237.0 ± 2.0
				Anisian	245.0 ± 1.5
			Early / Lower	Olenekian	249.7 ± 0.7
				Induan	251.0 ± 0.4
	P A L A E O Z O I C	P E R M I A N	Lopingian	Changhsingian	253.8 ± 0.7
				Wuchiapingian	260.4 ± 0.7
			Guadalupian	Capitanian	265.8 ± 0.7
				Wordian	268.0 ± 0.7
				Roadian	270.6 ± 0.7
			Cisuralian	Kungurian	275.6 ± 0.7
				Artinskian	284.4 ± 0.7
				Sakmarian	294.6 ± 0.8
				Asselian	299.0 ± 0.8
		C A R B O N I F E R O U S	Pennsylvanian (Late)	Gzhelian	303.9 ± 0.9
				Kasimovian	306.5 ± 1.0
			Pennsylvanian (Middle)	Moscovian	311.7 ± 1.1
Pennsylvanian (Early)			Bashkirian	318.1 ± 1.3
Mississippian (Late)			Serpukhovian	326.4 ± 1.6
Mississippian (Middle)			Visean	345.3 ± 2.1	Crail East Wemyss Kingsbarns
Mississippian (Early)			Tournaisian	359.2 ± 2.5
D E V O N I A N		Late / Upper	Famennian	374.5 ± 2.6
			Frasnian	385.3 ± 2.6
		Middle	Givetian	391.8 ± 2.7
			Eifelian	397.5 ± 2.7
		Early / Lower	Emsian	407.0 ± 2.6
			Pragian	411.2 ± 2.8
			Lochkovian	416.0 ± 2.8
S I L U R I A N		Pridoli	-	418.7 ± 2.7
		Ludlow	Ludfordian	421.3 ± 2.6
			Gordtian	422.9 ± 2.5	Marloes Sands
		Wenlock	Homerian	426.2 ± 2.4	Marloes Sands
			Sheinwoodian	428.2 ± 2.3	Marloes Sands
		Llandovery	Telychian	436.0 ± 1.9	Marloes Sands
			Aeronian	439.0 ± 1.8	Marloes Sands
			Rhuddanian	443.7 ± 1.5
O R D O V I C I A N		Late / Upper	Hirnantian	445.6 ± 1.5
			-	455.8 ± 1.6
			-	460.9 ± 1.6
		Middle	Darriwilian	468.1 ± 1.6
			-	471.8 ± 1.6
		Early / Lower	-	478.6 ± 1.7
			Tremadocian	488.3 ± 1.7
C A M B R I A N		Furongian	-	-
			Paibian	501.0 ± 2.0
		Middle	-	-
			-	513.0 ± 2.0
		Early / Lower	-	-
			-	542.0 ± 1.0

See 'A Geologic Time Scale 2004, by F. Gradstein, J. Ogg and A. Smith' for earlier periods.

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