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The Earth’s Drifting Continents Theory of Continental Drift Alfred Wegener suggested that the continents were once and have since drifted . Was not accepted until years later. Pangea The earth had a single large pieces, which has since moved that broke up into . Evidence to Support Continental Drift Fossils- preserved Rock limestone, salt, etc. Mountain Coal Glacial if organisms and ; coal, The Earth’s Spreading Ocean Floor Mid-ocean Ridges Under water and Trenches V shaped valleys at the usually found on the . Deepest part of the of oceans, which are of continents and Ocean Floor Spreading . Lava erupts at rift valleys and ocean . Explains how the continents move. to form new Subduction Process in which . Rocks are pushed are They crust plunges back into the into trenches where they by the heat of the earth. . Evidence to Support Ocean Floor Spreading Rock ageand rocks are found near rift valleys rocks are found near . Magnetic Stripes- magnetic rock line up with the equally on sides of the mid-ocean .