EARTHSC 2GG3 Lecture Notes - Lecture 5: Frank Slide, Tiltmeter, Crowsnest River
12 Jan 2017
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Definition: downslope movements of rock or sediment as a results of gravity. Movement is classified as rapid if it can be detected by eye. This is based on 4 variables: mechanisms of movement, type of material, amount of water present, speed of movement. Fall: rock or sediment dropping off the face of a cliff. Slide: downslope movement along a discrete failure plane (straight slide) Flow: movement of particles semi-independently of one another, commonly with the aid of water. This mass movement is caused by a fall mechanism. It involves rock rolling down a steep slope or falling through the air. This mass movement is caused by a slide mechanism. In a slump, the failure plane is curved upward. This mass movement is caused by a flow mechanism. Speed of movement ranges from a few millimeters to a meter annually. The stability of a slope is based on the balance between two types of forces: driving forces.
