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| Description: Precambrian History Precambrian – divided into the Archean eon Proterozoic eon Spans almost 90 percent of Earth’s history Much of Earth’s stable continental crust was created during the Precambrian Partial melting of the mantle formed volcanic island arcs and ocean plateaus These crustal fragments collided and accreted to form larger crustal provinces Picture Stats: Views: 357 Filesize: 2.39MB Height: 796 Width: 1200 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=39629 |