Moroccan fossil formation reshapes timeline of Early Phanerozoic evolution

Many new life-forms emerged during both the Cambrian Explosion and the Great Ordovician Biodiversification Event, but a lack of fossils from the 40-million-year span in between has left scientists wondering if a period of evolutionary stasis took hold between the two booms. Now, the discovery of a prodigious bed of fossils in Morocco that date to between 485 million and 444 million years ago indicates that the Ordovician boom may actually have been a continuation of the Cambrian Explosion, with little to no evolutionary downtime in between.

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Mary Caperton Morton

Mary Caperton Morton

Morton (https://theblondecoyote.com/) is a freelance science and travel writer based in Big Sky, Mont., and an EARTH roving correspondent.  

Wednesday, December 2, 2015 - 06:00