GEOG 1350 Lecture Notes - Lecture 5: Frank Slide, Rain Gauge, Grand Banks Of Newfoundland
26 Oct 2016
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Document Summary
Downslope movement of rock/sediment as result of gravity. Movement is classified as rapid if it can be detected by the naked eye. Fall: rock or sediment dropping off the face of a cliff. Slide: downslope movement along discrete failure plane. Flow: movement of particles semi-independently of one another commonly with the aid of water. Variables underpinning landslide classifications: mechanism of movement, type of material (debris, amount of water present (moisture, rate of movement (velocity) Factors to consider: material, cohesion, climate, slope. Rotational failure is when plane is concave up. Block slide is when consolidates, weathered material fails. This mass movement is caused by a fall mechanism. Rock rolling down steep slope or falling from air. In this mass movement the failure plane is curved upward. This mass movement is caused by a flow mechanism. Speed of movement ranges from few mm to m annually, trees curve down. More underwater landslides are complex events ex grand banks.
