Geological Time Overview

Eon/time

Era

Period

The Precambrian extends through the Hadean, Archean, and Proterozoic Eons. The Phanerozoic commences with the Cambrian.

Hadean Eon : 4.6 - 3.8Ga

Archean Eon : 3.8 - 2.5 Ga

3.8-3.6 Ga Eoarchean
3.6-3.2 Ga Paleoarchean
3.2-2.8 Ga Mesoarchean
2.8-2.5 Ga Neoarchean

Proterozoic Eon : 2.5 Ga ~ 542 Ma

2.5-1.6 Ga

Paleoproterozoic Era

Siderian 2.5-2.3
Rhyacian 2.3-2.05
Orosinian 2.05-1.8
Stratherian 1.8-1.6
1.6-1.0 Ga Mesoproterozoic Era Calymmian 1.6-1.4
Ectasian 1.4-1.2
Stenian 1.2-1
1.0 Ga-542 Ma Neoproterozoic Era Tonian 1.0 Ga -850 Ma
Cryogenian 850-635 Ma
Vendian or Ediacaran, 635-542

Phanerozoic Eon : 542 Ma - present

542-251 Ma Paleozoic Era Cambrian 542-488.3
Ordovician 488.3-443.7
Silurian 443.7-416
Devonian 416-359.2
Carboniferous 359.2-299.0 Mississippian and Pennsylvanian
Permian 299-251
251-65.5 Mesozoic Era Triassic 251-199.6
Jurassic 199.6-145.4
Cretaceous 145.4-65.5
Eon/time

Era

Period

Epoch

65.5-present Cenozoic Era Paleogene 65.5-23.03 Paleocene 65.5-55.8

Eocene 55.8-33.9 : ends with Grande Coupure extinction event

Oligocene 33.9-23.03 : climate cooling begins by end of epoch
Neogene 23.03-present

Miocene 23.03-5.332

Pliocene 5.332-1.806

Pleistocene 1.506-.005

.005- present

Labels: , , , , , , , , , , , , , ,

Links to this post:

Create a Link

<< Home

. . . since 10/06/06