Era
1775-1865
4
19th century
3
Colonial period, ca. 1600-1775
3
1735-1826
2
1783-1809
2
1800
2
1800-1899
2
20th century
2
Cenozoic
2
Civil War, 1861-1865
2
From 10 to 25 million years ago
2
From 2 to 65 million years ago
2
Miocene
2
Paleozoic
2
Pennsylvanian
2
Permian
2
Tertiary
2
1600-1699
1
1600-1775
1
1664-1718
1
1680-1690
1
1700-1799
1
1709-1763
1
1728-1784
1
1733-1931
1
1745-1798
1
1775 - 1783
1
1775 - 1865
1
1775-1783
1
1783 - 1809
1
1814-1899
1
1844-1900
1
1860
1
1861-1865
1
1861-1890
1
1862-1892
1
1876
1
19e siècle
1
Colonial period
1
From 140 to 190 million years ago
1
From 230 to 310 million years ago
1
From 230 to 570 million years ago
1
Grand Rapids
1
Jurassic
1
Kent County
1
Mesozoic
1
Michigan
1
Revolution, 1775-1783
1