GEOL105 Lecture Notes - Lecture 1: Silicate Minerals, Return Period, Oceanic Crust
19 May 2016
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Document Summary
Hazard: geologic process that is a potential threat to life or property. Disaster: when a hazard has an impact, often de ned as an event over a limited time in a de ned area. Catastrophe: massive disaster that requires signi cant amount of money and/or time to recover. Earth materials + energy = process: external energy (solar) helps drive surface processes. Heats oceans and atmosphere: in turn drives water cycle, ocean circulation, weather. Incoming light converted to heat in atmosphere, oceans and land: gravity. Creates pressure within the earth: mechanical energy. Seismic waves, ocean waves and tsunami (energy traveling through matter) Kinetic and potential energy: energy in all geologic processes is conserved. But is converted from one form to another. Effects of life on geology: in uences erosion and weathering, plays a big role in determining composition of the atmosphere, includes humans. People have on of the largest in uences of any organisms in earth"s history.
