Paleozoic Extinctions
Period 2 Science
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Cambrian-Ordivician
Ordovician-Silurian
Devonian
Carboniferious
Permian Triassic
Cambrian Period
542-488 Mya
Ordovician Period
488-444 Mya
Silurian Period
444-416 Mya
Devonian Period
416-359 Mya
Carboniferous
Period
359-299 Mya
Permian Period
299-251 Mya