Era
Precambrian
79
Quaternary
54
Paleozoic
23
Archaean
21
From 570 million to 5 billion years ago
18
From 2 million years ago
17
Pleistocene
15
Ordovician
14
Silurian
10
From 230 to 570 million years ago
9
Huronian
9
From 425 to 500 million years ago
7
From 10 thousand to 2 million years ago
6
Devonian
5
Paléozoïque
5
From 1 to 2 billion years ago
4
From 405 to 425 million years ago
4
From 2 to 5 billion years ago
3
1798-1875
2
1890-
2
From 345 to 405 million years ago
2
Holocene
2
Laurentian
2
Quaternaire
2
1919-2000
1
1945-
1
1945-1980
1
1962
1
19th century
1
Archean
1
From 10 thousand years ago
1
From 230 million to 5 billion years ago
1
From 345 to 425 million years ago
1
Mesozoic
1
Ordovicien
1
Pléistocène
1
Précambrien
1
Précambrien
1
Since 1945
1