GEOL 103 Lecture Notes - Lecture 1: San Andreas Fault, Continental Collision, Continental Crust
Document Summary
General reminders inclusions are always older than the rock that they are in the age of a rock (from seafloor spreading) increases moving toward continent the temperature of rock (from seafloor spreading) decreases moving toward continent. Midocean ridge goes through iceland plate under iceland consists of oceanic/continental lithosphere. Where plates diverge/move away result in creation of new materials. Mid ocean ridge: as plates moves away, mantle rock rises, begins to melt because of the decrease in pressure (decompression melting) As dense plate descends, releases water into the mantle, lowering the melting point and forming magma (flux melting) denser/older rock subducted. Where plates slide past each other without creating or destroying. Continental-continental collisions subduction consumes the ocean basin ocean closure ends in continental collision buoyant continental crust will not subduct the crust smashes together e. g. india/asia. Wilson cycle cycle of opening and closing of ocean basins.
