Era
1644-ca. 1723
2
1809-1868
5
1818-1893
1
1820-1910
2
1846?-1939
1
1863-1867
1
1868-
4
1869-1934
2
1881-1967
1
1886-1974
1
1890-
1
1897-1981
1
18th century
2
1900-1999
6
1907-
1
1914-2009
1
1919-
1
1934-
1
1956-
1
1958-
1
1969-
1
1982-
1
1985-2001
1
19th century
2
20th century
10
21st century
1
Cenozoic
1
Civil War, 1994-
1
Cretaceous
1
From 2 to 140 million years ago
1
From 65 million years ago
1
Jurassic
1
Tertiary
1
approximately 1845-1910
1
ca. 1865-1936
1
ca. 1874-1977
1