EOS-0002 Lecture Notes - Lecture 8: Boiling Point, Basalt, Inner Core
Document Summary
Flashing - groundwater in geysers flashes to steam as it goes from over its boiling point at a high pressure, to a lower pressure and boils almost instantly. Crust - oceanic is largely basalt (3 g/cm3), continental is largely granite (2. 6 g/cm3) Mantle - inside of crust, has convection currents that control plate tectonics. Lithosphere - composed of the crust and outer part of the mantle. Inner core - central layer of the earth. Asthenosphere - includes inner and outer core, and inner mantle. Divergent - plates moving away from each other, mid-ocean ridge (sea), rift valley (land) Convergent - plates moving towards each other, subduction (one plate getting pushed down into the earth), violent volcanic activity. Transform - plates moving parallel or crosswise, strike slip fault (san andreas, ca) Compressional - a folded anticline (n shape) or syncline (u shape)