Evolutionary Geologic Column |
||
ERA |
PERIOD |
AGE (Millions) |
CENOZOIC |
QUATERNARY |
Beginning of period |
Recent |
||
The Age of |
Pleistocene |
2 |
Mammals |
TERTIARY |
|
Pliocene |
5 |
|
Miocene |
24 |
|
Oligocene |
34 |
|
Eocene |
55 |
|
Paleocene |
65 |
|
MESOZOIC |
CRETACEOUS |
140 |
The Age of |
JURASSIC |
200 |
Dinosaurs |
TRIASSIC |
251 |
PALEOZOIC |
PERMIAN |
290 |
CARBONIFEROUS |
||
The Age of |
Pennsylvanian |
315 |
Trilobites |
Mississippian |
355 |
DEVONIAN |
405 |
|
SILURIAN |
440 |
|
ORDOVICIAN |
500 |
|
CAMBRIAN |
545 |
|
PRECAMBRIAN |
4500 |