Era
Cretaceous
205
Precambrian
182
Quaternary
131
Tertiary
121
Cenozoic
111
Paleozoic
106
Permian
100
Pennsylvanian
90
Mesozoic
83
Pleistocene
65
Eocene
58
Miocene
58
Triassic
55
Jurassic
54
Mississippian
52
Proterozoic
51
Devonian
47
Ordovician
46
Cambrian
32
Archaean
30
Oligocene
27
Silurian
25
Carboniferous
24
Holocene
24
Neogene
21
Pliocene
21
Paleocene
15
Paleogene
5
Anthropocene
4
1818-1891
1
1829-1887
1
1848-1927
1
1860-1890
1
1884-1955
1
1890-
1
1894-1964
1
1940-
1
19th century
1
Huronian
1