Era
Cretaceous
73
Precambrian
28
From 65 to 140 million years ago
26
Paleozoic
23
Mississippian
21
Quaternary
20
Proterozoic
15
Cenozoic
12
Mesozoic
12
Tertiary
12
From 2 million years ago
11
From 570 million to 5 billion years ago
11
Devonian
10
Paleocene
8
Cambrian
7
From 570 million to 2 billion years ago
6
From 65 to 570 million years ago
6
Pennsylvanian
6
From 280 to 345 million years ago
5
From 310 to 345 million years ago
5
From 500 to 570 million years ago
5
From 65 million years ago
5
1843-1901
4
From 230 to 570 million years ago
4
Jurassic
4
Pleistocene
4
Eocene
3
From 10 thousand to 2 million years ago
3
From 2 to 140 million years ago
3
From 310 to 405 million years ago
3
From 40 to 65 million years ago
3
Pliocene
3
20th century
2
From 140 to 190 million years ago
2
From 230 to 280 million years ago
2
From 425 to 500 million years ago
2
From 55 to 140 million years ago
2
Ordovician
2
Permian
2
Quaternaire
2
1807-1873
1
1820-1891
1
1824-1903
1
1831-1907
1
1844-1925
1
1865-1925
1
1900-1999
1
1972
1
19th century
1
20e siècle
1
more ...