Phanerozoic EonThe Phanerozoic eon stretches from nearly 540 million years ago to this day. The Phanerozoic eon is the eon where every thing began to take form.
●The Paleozoic era was around 20cm, 542 million years, ago. This era was a long time ago and there is not much we know about it. But this was the point when things started to happen and more life was being created. Before this era there was a sort of standstill in time, because hardly even minor changes were happening.Paleozoic Era●Cambrian Period●Ordovician Period●Silurian Period●Devonian Period●Carboniferous Period●Permian Period●In the Cambrian period, there were only microscopic marine plants and small marine animal life, and there was almost nothing on the surface.