Geologic History Chart
Era Time Millions of Yrs Ago Began — Ended Major Geological Events Major Biological Events Canadian Landforms Created Precambrian (earliest life) 4600 570 – volcanoes erupted, many cycles of mountain building and erosion – 1st single-celled organisms – 1st multi-celled organisms – Canadian Shield formed Paleozoic (ancient life) 570 245 – periods when large parts…