... and South Downs in England. As it can be dissolved by rainwater it is Karstic with such features as caves, sink holes and karstic cavities occurring along faults, flints and marls. The scarp slopes of the Downs were oversteepened during the Ice Ages. Chalk cliffs (of Southern England and NW France), due to their weakness, erode relatively quickly, yet the interbedding of weak and stronger layers allows high cliffs to form. When these fail, large landslips occur. The valley system has long been related to a greater intensity of fracturing and faulting in the valleys. This may not be the entire cause, rather many of the valleys may be related to the gentle synclines between the gentle domes (structural) of the Chalk, with the water migrating laterally (along the marl and flint layers) firstly down the dip slopes of the domes and then along the regional dip slope in the synclines, ...

See this essay or coursework document in full right now