Colonial period, ca. 1600-1775 19
Cretaceous 18
18th century 16
20th century 16
Tertiary 16
Mesozoic 13
Paleozoic 11
19th century 10
Cenozoic 9
Triassic 9
17th century 8
Pleistocene 7
Cambrian 6
Carboniferous 6
Devonian 6
Ordovician 5
Precambrian 5
To 1763 (New France) 5
21st century 4
Revolution, 1775-1783 3
Silurian 3
1775-1865 2
1785-1851 2
1789-1869 2
Archaean 2
French and Indian War, 1754-1763 2
Holocene 2
Jurassic 2
Paleocene 2
Quaternary 2
To 1789 2
To 1803 2
To 1848 2
-1498? 1
-approximately 1395 1
-approximately 1405 1
1552?-1616 1
1648-1789 1
16th century 1
1730-1799 1
1732-1799 1
1743-1826 1
1750-1815 1
1755-1763, French and Indian War 1
1775-1783 1
1775-1783, Revolution 1
1786-1847 1
1787-1858 1
1789-1815 1
1805-1859 1
1810- 1
1830-1848 1
1847-1879 1
1848-1870 1
1849-1947 1
1858-1929 1
1858-1942 1
1865-1915 1
1868-1952 1
1881-1950 1
1881-1955 1
1882-1945 1
1886-1948 1
1890-1959 1
1896-1978 1
1908-2005 1
1929 1
1934- 1
1934-2024 1
1942- 1
1943- 1
1944- 1
1945-2010 1
1946- 1
1963- 1
1965- 1
1969- 1
1970-1994 1
1981-2001 1
Dovanian 1
Early accounts to 1600 1
Eocene 1
Huguenot colony, 1562-1565 1
Indian occupation, 1969-1971 1
Mississippian 1
Proterozoic 1
Spanish colony, 1540-1810 1
To 1763 1
To 1775 1
To 1791 1
To 1810 1
To 1821 1
To 1830 1
To 1846 1
To 1867 1
approximately 1474-1557 1
approximately 1500-1542 1