1911: Wegener’s theory of continental drift
Continents sit on large plates (called tectonic plates) made up of the Earth’s crust and upper sections of mantle. These plates float on the rest of the mantle. Heat from inside the Earth cause convection currents that caused the tectonic plates to move.
Evidence supporting Wegener’s Continental Drift theory
Radio processes (ongoing); The earth's core is radioactive and produces heat that reaches the surface through convection currents in the mantle
Earthquakes and Volcanoes (1940): If you plot occurrences of volcanoes and earthquakes they seem to build up in lines around the Earth
Rising Himalayas ( 1950/60)- The himalayan mountain range is rising between about 5 and 10 mm a year
Fit of the continents (1900)- The continents especially Africa and south America seem to fit together like a jigsaw
Rock types (1900) : Rocks of the same mineral content and age can be found directly opposite on widely separated continents
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