Earth Sciences 1089F/G Final: Earth Science 1089 Final Exam Notes.docx
22 Oct 2014
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Document Summary
Earth"s changing face the rock cycle any of the three rock classes (igneous, sedimentary and metamorphic) can be changed into the other rock classes to igneous melting, cooling to sedimentary erosion, deposition to metamorphic baking, pressing. Magma that cools at depth forms gabbro of lower crust. Magma that cools at surface forms basalt: two of the arms continue to spread, forming oceanic lithosphere of an ocean basin. The remaining failed arm stops spreading and becomes filled with sediment (ex: bay of fundy: early evidence of seafloor spreading. Linear arrangement and relative heights of hot spot volcanoes (volcanoes produced by movement of plate over stationary magma plumes from mantle) If a mountain chain is close to the sea, a clastic wedge can form: compression created by converging plates, together with heating of rock as the crust is thickened and lowered downward produces regional metamorphism. Mother nature"s chisel: processes of weathering and erosion. Presence of acids greatly increase corrosive action of water.
