Describe the following process of mass wasting.
i)Rock fall.
ii)Subsidence.
iii)Mud flows.

Rock fall:
-occurs where rocks are well jointed and with steep slopes. Rock parts are detached from the
steep slopes and fall rapidly at the base of slope.
-Frequent freeze-thaw action on steep slope produces particles which get detached
and fall at the base of rock face.

Subsidence:
-Subterranean weathering leads to formation of caves or caverns. Where the roof is
too heavy to remain suspended, it collapses vertically.

Mud flows:
-wet and loose soil materials saturated with water will move down the
hill. (As the semi-liquid mud collects more materials, it becomes heavier until it
comes to rest at the floor of the slope).