EES 1030 Lecture Notes - Lecture 2: Glacial Striation, Plate Tectonics, Equatorial Bulge
16 Feb 2018
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Document Summary
It caused a tsunami, and a nuclear power plant meltdown (7. 0 out of 7. 0 rating scale): all nuclear reactors taken offline, many people killed, displaced, and buildings destroyed/damaged. Plate tectonics explains almost everything: rock type distribution, where oceans are, where mountains are, earthquakes, volcanoes, etc. The plate tectonic concept is only about 50 years old! There was reasonable doubt for wagner"s theory because he lacked geospherical evidence (evidence from the earth"s crust, mantle & inner metallic core) as to how the continents moved. Continental drift the continents move around the earth. Polflucht: flight from the poles gravitational attraction of earths slight equatorial bulge. Mantle: about 3,000 km thick, made from mg + fe. Outer core: 2900 to 5200 km, fe-ni metal alloys. Inner core: 5200 to 6400 km fe-ni metal alloys. Structure of the earth elements (al, fe, mg, ca, k, na) silicates (sio2)
