User:Bcasterline/Geologic time scale

Eon	Era	Period		Series/ Epoch	Start, Million Years Ago
Phane- rozoic	Cenozoic	Neogene		Holocene	0.011430 ± 0.00013
				Pleistocene	1.806 ± 0.005
				Pliocene	5.332 ± 0.005
				Miocene	23.03 ± 0.05
		Paleogene		Oligocene	33.9±0.1
				Eocene	55.8±0.2
				Paleocene	65.5±0.3
	Mesozoic	Cretaceous		Upper/Late	99.6±0.9
				Lower/Early	145.5 ± 4.0
		Jurassic		Upper/Late	161.2 ± 4.0
				Middle	175.6 ± 2.0
				Lower/Early	199.6 ± 0.6
		Triassic		Upper/Late	228.0 ± 2.0
				Middle	245.0 ± 1.5
				Lower/Early	251.0 ± 0.4
	Paleozoic	Permian		Lopingian	260.4 ± 0.7
				Guadalupian	270.6 ± 0.7
				Cisuralian	299.0 ± 0.8
		Carbon- iferous/ Pennsyl- vanian		Upper/Late	306.5 ± 1.0
				Middle	311.7 ± 1.1
				Lower/Early	318.1 ± 1.3
		Carbon- iferous/ Missis- sippian		Upper/Late	326.4 ± 1.6
				Middle	345.3 ± 2.1
				Lower/Early	359.2 ± 2.5
		Devonian		Upper/Late	385.3 ± 2.6
				Middle	397.5 ± 2.7
				Lower/Early	416.0 ± 2.8
		Silurian		Pridoli	418.7 ± 2.7
				Ludlow	422.9 ± 2.5
				Wenlock	428.2 ± 2.3
				Llandovery	443.7 ± 1.5
		Ordovician		Upper/Late	460.9 ± 1.6
				Middle	471.8 ± 1.6
				Lower/Early	488.3 ± 1.7
		Cambrian		Furongian	501.0 ± 2.0
				Middle	513.0 ± 2.0
				Lower/Early	542.0 ± 1.0
Proter- ozoic	Neo- proterozoic	Ediacaran			630 +5/-30
		Cryogenian			850
		Tonian			1000
	Meso- proterozoic	Stenian			1200
		Ectasian			1400
		Calymmian			1600
	Paleo- proterozoic	Statherian			1800
		Orosirian			2050
		Rhyacian			2300
		Siderian			2500
Archean	Neoarchean				2800
	Mesoarchean				3200
	Paleoarchean				3600
	Eoarchean				3800
Hadean	Lower Imbrian				c.3850
	Nectarian				c.3920
	Basin Groups				c.4150
	Cryptic				c.4570