GEOL-1010 Lecture Notes - Lecture 2: Plate Tectonics, Continental Crust, Nikel

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Geology in the news: 6. 2 magnitude earthquake hit italy, 100+ people killed, this will probably show up on the exams though they will probably be simple/easy questions. Layers of the earth: theia impact and density stratification (see lecture 1, compositional layers of the earth, 4 layers defined by chemical layers (compositional layers) Crust (8-45 km: light elements (silicone [si], aluminum [al], etc. , made up of low density elements and small amounts of high density elements, 2 types of crust. Mantle (45-2900km: made of denser elements, higher amounts of iron, magnesium, manganese, etc. About 4% or so nikel and trace elements: we can study the composition of lava and meteorites to find out what makes up the center of the earth. Physical layers of the earth: 5 layers, defined by physical (aka mechanical) strength, lithosphere. All of the crust and the upper-most part of the solid mantle.

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