Era
Cretaceous
614
Quaternary
373
Precambrian
337
Tertiary
331
Paleozoic
276
Cenozoic
237
Permian
218
Pennsylvanian
168
Mesozoic
164
Jurassic
155
Eocene
154
Pleistocene
138
Mississippian
130
Miocene
127
Ordovician
119
Triassic
118
Devonian
114
Proterozoic
98
Cambrian
87
Holocene
74
Pliocene
63
Silurian
63
Oligocene
62
Carboniferous
50
Paleocene
48
Archaean
47
Neogene
36
Paleogene
18
Pre-Quaternary
15
Anthropocene
9
1818-1891
2
1829-1887
1
1848-1927
1
1860-1890
1
1884-1955
1
1890-
1
1894-1964
1
1902-1996
1
1940-
1
1979
1
19th century
1
Huronian
1
Pre-Cenozoic
1