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
|