Plate tectonics- motion and formation of crustal platesLithosphere- the stiff upper layer of the Earth’s crust, rock like Continental plate – less dense, thicker, usually made of granite Oceanic plate – more dense, thinner, usually made of basalt SEE ESRT CHART – LIST SOME OCEANIC PLATES, LIST SOME CONTINENTAL PLATESAsthenosphere- the plastic, gel like layer, partially molten due to Fe, Si and S (lowers the melting point SEE ESRT CHART Show convection currents – heat rises and cool sinks – MOTION IS SLOW! Himalyan mtns, Ural Mtns in Europe, Appalachian Mtns on east coast of NAmer Subduction – one plate more dense (oceanic) and plunges under the less ...
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