| 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 |
