Era
Cretaceous
615
Quaternary
375
Precambrian
338
Tertiary
332
Paleozoic
278
Cenozoic
238
Permian
219
Pennsylvanian
168
Mesozoic
164
Jurassic
158
Eocene
154
Pleistocene
138
Mississippian
131
Miocene
128
Ordovician
119
Triassic
119
Devonian
114
Proterozoic
98
Cambrian
89
Holocene
74
Silurian
64
Pliocene
63
Oligocene
62
Carboniferous
50
Paleocene
48
Archaean
47
Neogene
36
Paleogene
18
Pre-Quaternary
15
Anthropocene
9
1818-1891
2
1769-1839
1
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