lotc.calotc.ca/wp/wp-content/uploads/2018/02/2009.pdf · Late Proterozoic to Early Cambrian...
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lotc.calotc.ca/wp/wp-content/uploads/2018/02/2009.pdf · Late Proterozoic to Early Cambrian (740—513 million years ago) The story began with North America departing from the supercontinent