You have now walked most of the way to Bishopstone Glen. Picture 'a' shows the view southwestwards where the darker London Clay appears in the cliff top, first as a thin layer and then it becomes progressively thicker. This layer of clay is very active and when wet collapses very easily.
Just around the corner where the clay forms a thicker layer, mudflows [ picture 'b' ] are very common and the clay can frequently be seen oozing down the cliff-face as a sticky mass. The sign in Picture 'b' says "Beware Soft Mud".
The type of mass movement which occurs depends upon the amount of water in the clay and in Picture 'c' the very wet clay is running down the cliff face and forming a depositional fan. Since there are houses close to the cliff edge, action has had to be taken to try and stop the cliff collapsing. Some of the clay has been removed (grading of the cliff-top)and large boulders or rip-rap were placed in front of the last section of cliff in 1995-6. These can be seen in the background of Picture 'c'.
Picture 'd' shows some of the large slumps which have occurred here. In this instance, large sections of the cliff-face have moved along a curved rotational slip-plane. Remnants of the older houses which have collapsed down the cliffs are often seen in amongst the clay deposits.