EOSC 118 Lecture Notes - Lecture 5: Source Rock, Gemstone, Plate Tectonics
31 Jan 2018
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Scienti c method: observation, form a hypothesis, test hypothesis, repeated testing > theory, theory > law, re-examination. Can form within a continental plate to ultimately form a new ocean basin. Two oceanic plates form chain of volcanic islands or one oceanic and one continental plate (one subjected under the other) Oceanic subjected under continental (density: transform. Valuable minerals originated from an original source rock. A rock can be a gemstone: minerals. Heat, pressure, or uids can transform rock. New minerals can form due to pressure: sedimentary. Transformed into rock through lithi cation which cements grains together. Chemical precipitation evaporate (body of water evaporates to form layers of salt) Biological precipitation coral reefs, coal, etc . Geological time (condensed into a year: jan 1 earth forms, nov 18 rst creatures with shells evolve, dec 25 dinosaurs become extinct, dec 31 11:59:57 pm modern humans evolve.
