Era
Quaternary
14
Cretaceous
12
Ordovician
6
Pleistocene
6
1945-1989
5
Paleozoic
5
1989-
4
Cenozoic
4
Precambrian
4
Tertiary
4
1879-1955
3
19th century
3
Carboniferous
3
Devonian
3
Jurassic
3
Mississippian
3
Triassic
3
1473-1543
2
1564-1642
2
1809-1882
2
1822-1884
2
20th century
2
Before 1846
2
From 2 million years ago
2
Miocene
2
Permian
2
Pliocene
2
Since 1945
2
1520-1564. /
1
1561-1629
1
1582-1666
1
1642-1727
1
1710-1791
1
1728-1779
1
1729-1798
1
1731-1806
1
1733-1804
1
1748-1819
1
1769-1859
1
1788-1823
1
1790-1849
1
1796
1
17th century
1
1803-1873
1
1806
1
1811-1832
1
1813-1878
1
1818-1892
1
1823
1
1825-1909
1
more ...