Era
Miocene
12
Jurassic
10
Tertiary
10
Cretaceous
8
Cenozoic
7
Oligocene
6
Quaternary
5
1802-1847
4
19th century
4
20th century
3
1784-1857
2
1808-1847
2
1815-1875
2
1834-1915
2
21st century
2
Eocene
2
Holocene
2
Neogene
2
Pre-Quaternary
2
1564-1616
1
1785-1848
1
1789-1869
1
1798-1840
1
1801-1881
1
1803-1874
1
1806-1879
1
1813-1884
1
1813-1890
1
1815-1862
1
1819-1891
1
1846-1850
1
1847-1865
1
1849-1861
1
1851-1866
1
1859-
1
1859-1935
1
1859-1950
1
1860-1939
1
1866-1895
1
1898-1943
1
1912-1997
1
1938-
1
1946-
1
1958-
1
1960-1988
1
1975-
1
Devonian
1
Edo period, 1600-1868
1
Meiji period, 1868-1912
1
Permian
1
more ...