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Unformatted text preview: • S shaped wave moving from side to side • Slower; reaches epicenter after P waves 3. Surface Waves • Caused by interaction of P & S waves. • Causes the surface to roll. • Originate from epicenter; not focus. • Most destructive Section 2: Folds, Faults, and Mountains Folding- bending rock Two types: 1. Anticlines 2. Synclines (sink) Fault- joint, or crack in rock. Types: 1. Normal Fault • Caused by tension • Hanging wall drops below footwall. Footwall Hanging wall • Forms fault block mountains 2. Reverse Faults • Caused by compression • Hanging wall moves up in relation to footwall. • Forms oversthrust mountains Hanging wall Footwall 3. Lateral Faults • Caused by shearing (sliding in opposite directions) • Causes friction • Earthquakes are common • San Andreas Fault...
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This note was uploaded on 12/25/2011 for the course GEOG 123 taught by Professor Mitchelle during the Fall '10 term at Everglades.
- Fall '10