-
541 BCE
cambrian
The Atmosphere is full of oxygen and animals develop. The earth doesn't have UV protection yet -
485 BCE
ordovician
-
443 BCE
silurian
-
419 BCE
devocian
-
358 BCE
carboniferous
-
298 BCE
permian
-
251 BCE
triassic
-
Period: 251 BCE to 201 BCE
triassic
-
Period: 201 BCE to 145 BCE
jurassic
-
Period: 145 BCE to 66 BCE
cretaceous
-
Period: 65 BCE to 2 BCE
tertiary