Era
Quaternary
12
Cretaceous
8
From 2 million years ago
7
Jurassic
6
Ordovician
5
Paleozoic
5
From 65 to 140 million years ago
4
Precambrian
3
Carboniferous
2
From 10 thousand years ago
2
From 140 to 190 million years ago
2
From 2 to 65 million years ago
2
From 230 million to 5 billion years ago
2
From 230 to 570 million years ago
2
From 280 to 345 million years ago
2
From 425 to 500 million years ago
2
Holocene
2
Mesozoic
2
Neogene
2
Paleogene
2
Silurian
2
Tertiary
2
1769-1855
1
1865-1968
1
1900-
1
From 140 to 230 million years ago
1
From 405 to 425 million years ago
1
From 65 to 230 million years ago
1
Triassic
1