Post on 12-May-2015
Cliffs are also susceptible to mass movements. These can be slow or
sudden.
Waves attack the cliffs at the base, undercutting
them.
Takes place on soft rock.Rain saturates the top of
the cliff.
Rock slumps into the sea.
Takes place on harder rock, built up in layers. The top layer may become
saturated.
It slides over the layer beneath- rapidly moving
downhill.
Very fine loose material becomes saturated with
water and just flows down a slope.
http://www.flickr.com/photos/earthwatcher/3426369280/in/set-72157616446077703/
http://www.flickr.com/photos/vikellis/2812428756/
Freeze-thaw weathering will shatter rocks from
cliffs- material will gather at the base.
Talus/ Scree slope.
http://www.flickr.com/photos/ush/2839961487/
Soil particles expand due to moisture. They are lifted at a right
angle away from the slope.
As they dry, they shrink, but the force of gravity pulls them
vertically down.
There is a slow downward movement of material over time.
http://www.flickr.com/photos/rschott/474190143/