section 8 the cambrian explosion and the diversification of animals

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61. Within 50 million years every major animal phylum known in fossil records quickly appeared during what is known as the Cambrian Explosion.

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A methane fuse for the Cambrian explosion: carbon cycles ...web.gps.caltech.edu/~jkirschvink/pdfs/KirschvinkRaubComptesRendus.pdfthat occurred coincident with the Cambrian Explo-sion

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