GLG 111 Lecture Notes - Lecture 10: Mass Wasting, Shear Force, Regolith
Document Summary
Natural hazards mass movements natural phenomenon that has the potential to cause death and damage: earthquakes, volcanoes, storms, floods, mass movements. Mass movement (mass wasting: downslope movement of rock, regolith, soil cuz gravity. Competing forces gravity pulls object towards surface. Normal force goes towards earths center, shear force is parallel to the surface. If normal is greater it wont move, if shear is greater it will slide. Small amounts of water glues particles together and helps it stay in place, large amounts reduce friction and help it move. Creep the slow downhill movement of soil and weathered rock (regolith) Rock glacier mass movements made by rock fragmetns embedded in ice (glaciers) Slumping mass movements that do not disintegrate into a jumble of debris (remains coherent) Lahar mudflow consisting of volcanic ash and water formed from melting ice and snow during a volcanic eruption. Rock slide the sudden movement of rock down a non-vertical slope.
