Cambrian period — early Palaeozoic interval of rapid animal diversification Cambrian The Cambrian (≈541–485 Ma) is the first period of the Palaeozoic and Phanerozoic, marked by the Cambrian explosion, widespread marine life, the appearance of many animal phyla, and…
Cambrian explosion: rapid diversification of animal life in the early Paleozoic Cambrian explosion The Cambrian explosion refers to the relatively brief geological interval around 541 million years ago when most major animal body plans first appear in the fossil record, promptin…
