Geology Flashcards
What is geology in context of mass movement
Geology is the nature of slope material as well as the steepness of the slope
How does geology influence mass movement
Geology plays a significant role in influencing mass movement as characteristic of slope can affect type of mass movement found.
What happen to slope made of clay
Slope mad of clay has high cohesiveness, but readily absorbs water in its structure when available , causing water to sling onto surface, this reduces internal friction and cohesion , shear strength may also decrease.
What happen if slop has low cohesion and strength
Low cohesion and strength will make material more susceptible to sliding and flowing , causing mass movement to occur. While high cohesion and strength provide resistance to mass movement.
What happen to materials with low permeability
Materials with low permeability, retains water , which adds on weight and can potentially reduced strength
How does steepness of slop affect mass movement
The steeper the slop angle , the higher chance for mass movement to occur
Give an example of this
A mass movement occured called the downie slide that occured in north of revelstroke , where a massive body of rock slide down very slowly on a very steep slope along a plane of weakness that is approximately parallel to the slope , showing that characteristic of slope can trigger mass movement
What is the steepest angle of a slope can maintain without collapsing
It the angle of repose, where the shear strength of slope material exactly balances out the shear stress acting on the slope.
