Archeozoic
,
prelife era
.
1 billion to 550 million
years
ago.
[1]
Proterozoic
,
life-dawn era
.
550 to 400 million
years
ago.
[2]
Paleozoic
, marine-life era.
400 to 150 million
years
ago.
[3]
Cambrian
, trilobite age.
400 to 350 million
years
ago.
[4]
Ordovician
, invertebrate-animal age.
350 to 300 million
years
ago.
[5]
Silurian
,
coral
and brachiopod age.
300 to 275 million
years
ago.
[6]
Devonian
, age of plant
life
and
fishes
.
270 to 220 million
years
ago.
[7]
Carboniferous
, age of fern
forests
and
frogs
.
220 to 180 million
years
ago.
[8]
Permian
, seed-plant age and biologic tribulation.
170 to 150 million
years
ago.
[9]
Mesozoic
, early land-life era.
150 to 50 million
years
ago.
[10]
Triassic
, early-reptilian age.
150 to 125 million
years
ago.
[11]
Jurassic
, later-reptilian age.
125 to 100 million
years
ago.
[12]
Cretaceous
, age of flowering
plants
and
birds
.
100 to 50 million
years
ago.
[13]
Cenozoic
, mammalian era.
50 million
years
ago to the
present
.
[14]
Eocene
, early-mammal age.
50 to 35 million
years
ago.
[15]
Oligocene
, advanced mammal age.
35 to 25 million
years
ago.
[16]
Miocene
, age of
elephant
and horse.
25 to
10
million
years
ago.
[17]
Pliocene
, mammalian migration stage.
10
to 1 million
years
ago.
[18]
Pleistocene
,
ice
age.
2 million to 100,000
years
ago.
[19]
Holocene
, post-glacial period.
35,000
years
ago to the
present
.
[20]
¶
References
↑
UB 59:0.2
;
UB 78:7.4
↑
UB 58:7.1
;
UB 59:0.3
↑
UB 59:0.4
;
UB 59:6.11
↑
UB 59:1
↑
UB 59:2
↑
UB 59:3
↑
UB 59:4
↑
UB 59:5
↑
UB 59:6
↑
UB 59:0.5
;
UB 60:4.6
↑
UB 60:1
↑
UB 60:2
↑
UB 60:3-4
↑
UB 61:0
↑
UB 61:1
↑
UB 61:2
↑
UB 61:3.15
↑
UB 61:4
↑
UB 61:5-7
↑
UB 61:7.18
See also:
UB 59:0.1-6
.