How many years passed between the Cambrian explosion and the Cambiran mass extinction event?
about 42 million years (530 – 488) 1) “The Cambrian explosion or Cambrian radiation was the seemingly rapid appearance of most major groups of complex animals around 530 million years ago, as evidenced by the fossil record.” Source and further information: http://en.wikipedia.org/wiki/Cambrian_explosion 2) “The Cambrian–Ordovician extinction event occurred approximately 488 million years ago. It was the first major extinction event in the Phanerozoic eon and it eliminated many brachiopods and conodonts, and severely reduced the number of trilobite species. The Cambrian–Ordovician event ended the Cambrian period, and led into the Ordovician period in the Paleozoic era.” Source and further information: http://en.wikipedia.org/…/…
