Geol 1040 1st Edition Lecture 25Outline of Last Lecture XXVIII. Convergent boundariesa. Stressb. Strainc. GeographyXXIX. Divergent Boundariesa. Stressb. Strainc. GeographyXXX. Transform Boundariesa. Stressb. Strainc. GeographyXXXI. Deformation: Foldsa. Causeb. Typesc. PartsOutline of Current Lecture XXXII. Elastic Rebounda. Stressb. Resistancesc. PredictionXXXIII. Earth Quakesa. Stressb. Epicenterc. Hypocenterd. Type of rocksXXXIV. Seismic wavesa. Periodb. Velocityc. TypesCurrent LectureXXXII. Elastic Rebounda. Stressi. Rocks on both side of a fault experience tectonic stressThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.ii. Rocks bend and store elastic energy (strain energy)b. Resistancesi. Frictional resistance on fault planes hold the rocks togetherii. Friction is eventually overcome and slippage at the weakest point occursc. Predictioni. Earth quakes cannot be predicted, but we can look at the historical cycle.XXXIII. Earth Quakesa. Stressi. Faults take so much stress that it has to release1. This creates an earth quakea. It then takes time to build that stress up againb. Epicenteri. The location on Earth’s surface where the earthquake startsc. Hypocenteri. The area within the Earth where the Earth Quake originatesd. Type of rocksi. Earth Quakes need old rocksii. These rocks are cooler and can act in a brittle matter1. Warmer rocks will act in a ductile matterXXXIV. Seismic wavesa. Periodi. Time it takes for a complete wave to pass a given pointb. Velocityi. Rate at which it takes a wave to travel1. Length/timec. Typesi. Surface Waves1. Move near surface2. More destructiveii. Body Waves1. Passes through Earth’s interior2. Fasteriii. P Waves1. Compress then expandsiv. S Waves1. Sheer
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