The relatively rapid appearance of most major animal phyla, as demonstrated in the fossil record, accompanied by major diversification of organisms including animals, phytoplankton, and calcimicrobes:
Cambrian Explosion
Cambrian Explosion was over a period of many millions of years around 530 million years ago.
Cambrian Explosion
Cambrian Explosion was over a period of many millions of years around 530 million years ago.
