Era
Cretaceous
731
Quaternary
433
Tertiary
346
Cenozoic
265
Paleozoic
251
From 65 to 140 million years ago
199
Precambrian
194
Jurassic
191
Eocene
152
Miocene
152
Devonian
142
Mesozoic
140
From 2 million years ago
138
Mississippian
131
Pennsylvanian
131
Pleistocene
127
Ordovician
125
Permian
117
Pliocene
112
Proterozoic
111
Holocene
91
Cambrian
89
Paleocene
82
Triassic
81
Silurian
71
From 2 to 65 million years ago
69
From 570 million to 5 billion years ago
65
From 65 million years ago
64
Oligocene
63
From 140 to 190 million years ago
60
From 230 to 570 million years ago
60
From 40 to 55 million years ago
58
From 2 to 140 million years ago
49
Carboniferous
44
From 345 to 405 million years ago
41
From 570 million to 2 billion years ago
38
Neogene
33
From 310 to 345 million years ago
31
1979
29
20th century
29
From 10 thousand years ago
29
Archaean
28
From 10 thousand to 2 million years ago
28
Pre-Quaternary
28
From 280 to 310 million years ago
27
From 65 to 230 million years ago
27
From 425 to 500 million years ago
25
From 10 to 25 million years ago
24
From 190 to 230 million years ago
24
1972
23
more ...