EAES 101 Lecture Notes - Lecture 10: Feldspar, Exogeny, Asthenosphere
20 Sep 2016
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Iclicker: the sun is the dominant source of heat for all of the earth (both surface and internal: false. Plate tectonics: the outer portion of the earth is made up of about 20 distinct plates (~100 km thick) (lithosphere), which move relative to each other, plate tectonics explains volcanoes, earthquakes, sea-floor spreading, mountains, Divergent plate boundary: two plates moving away from each other, forming a new crust. Convergent plate boundary: two plates move towards each other, while one sinks and overall destroys it. Transform plate boundary: two plates shift and move past each other. Plate tectonics is driven by convection in the mantle: each plate weighs trillions upon trillions of metric tons, convection may have overturned asthenosphere 4-6 times. Iclicker: which type of plate movement creates new crust: divergent. Iclicker: which type of plate movement consumes/destroys crust: convergent. Why care about minerals: building rocks of the planet, make up rocks and sediment, understanding earth requires understanding minerals.
