Era
Cretaceous
11
Pleistocene
7
Triassic
7
From 65 to 140 million years ago
5
Quaternary
5
From 10 thousand to 2 million years ago
4
Jurassic
4
Precambrian
3
From 2 million years ago
2
Miocene
2
Paleozoic
2
1886-1973
1
1888-1935
1
1897-1957
1
1900-
1
1917-1948
1
1922-1995
1
1960-1963
1
1970
1
1980
1
1990
1
2010
1
2020
1
20th century
1
Cenozoic
1
Eocene
1
From 140 to 190 million years ago
1
From 190 to 230 million years ago
1
From 570 million to 5 billion years ago
1
From 65 million years ago
1
Holocene
1
Trias
1