Mass Movement

Question 1

What is a slow mass movement and explain what causes it

Answer 1

Soil creep: water gets stored in the soil and it will cause the landscape to slightly move down a hill every year (1cm) it also moves downward because that plant roots may have been removed so the soil particles arent bound together anymore so they are loose and slide

Question 2

A fast mass movement

Answer 2

bog burst: it occurs when peat has become saturated with rainwater in upland areas where wet heavy peat can move more quickly downslope.

Question 3

another fast mass movement

Answer 3

landslide: it occurs when a base of a slope is cut out to make room for a e.g. road and if the trees and roots have been removed from the hill it becomes unstable because there is no base to support it

Question 4

a rapid mass movement

Answer 4

mudflow: a mudflow occurs when soil and rainwater mix to form mud which moves fast downhill. Mudflows can also occur when when snow and volcanic ash mix this is called ‘lahor’