Top Ten Geological Time Periods of Earth

Time periods of the Paleozoic, Mesozoic, and Cenozoic eras.
The Top Ten
1 Ordovician Period
2 Quaternary Period
3 Jurassic Period
4 Permian Period
5 Cambrian Period

This is the first period of the Paleozoic era and one of the most pivotal for the evolution of all life on Earth. The Cambrian explosion gave rise to many new evolutionary advantages such as eyes and gills and many of the species of animals we see today all descended from them.

6 Cretaceous Period
7 Triassic Period
8 Carboniferous Period
9 Devonian Period

The age of fishes.

10 Tertiary Period
The Contenders
11 Paleogene Period
12 Neogene Period
13 Silurian Period
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