The town sits at the southern end of the North Downs, where they meet the sea, and unlike the white chalk cliffs at nearby Dover, the cliffs at Folkestone are of Greensand and Gault clay. (directferries.com)
When I was 10 or 11, I used to go walking on the big chalk cliffs south of London and look across the English Channel. (discovermagazine.com)
If you want proof that the south coast of England was once connected to the northern coast of France, it's here by the millions of tons — 100ft - high chalk cliffs, miles of them, that match those at Dover. (evo.co.uk)