Era
1743-1826
1
1878-1974
1
1881-1971
1
1882-1966
1
21st century
4
Archaean
2
Cambrian
2
Carboniferous
3
Cenozoic
38
Cretaceous
83
Devonian
4
Earthquake, 1984
1
Earthquake, 1987
2
Earthquake, 1989
1
Eocene
9
Holocene
24
Jurassic
14
Mesozoic
20
Miocene
18
Mississippian
8
Neogene
7
Oligocene
7
Ordovician
5
Paleocene
8
Paleogene
8
Paleozoic
31
Pennsylvanian
7
Permian
12
Pleistocene
13
Pliocene
23
Precambrian
16
Proterozoic
11
Quaternary
45
Silurian
4
Tertiary
31
Triassic
5