Geology
The Rocks that underlay most of East Sussex are Jurassic to Cretaceous in age 150 million years ago to 65; around 2 million years ago the Wealden Anticline was formed, due to the continental collision of Africa with Europe. The dome extends from the coast to the North Downs, in Kent and Surrey and across the channel to France; Sussex has played an important role in Geology, the first dinosaur was identified others had been found, but not identified in Cuckfield, in West Sussex, one of the greatest hoaxes of modern times, the Piltdown Man was 'discovered' in Piltdown near Uckfield and the cliffs that line the coast are noted for their specimens of Ammonites, fishes and other marine animals, the cliffs at Peacehaven, near Brighton are famous for their giant ammonites. Dinosaur footprints can be seen at Fairlight, east of Hastings. For those interested in minerals, small deposits of Aluminate are present in the Tertiary sands of Newhaven
Geography
Sussex has a varied and beautiful geography. From the stunning Seven Sisters Chalk Cliffs near Eastbourne to the flat marshes of Pevensey and the high Ground of Ashdown Forest to the beautiful lowlands and river landscapes of the Lower Weald. Sussex is the most forested county in England and lost in Friston Forest or Ashdown Forest although much of it is open land it is easy to believe. Often the only thing breaking the horizon is trees or the Downs.
The country has a dense and varied network of footpaths see East Sussex Footpaths making walking easy, walking books and ordinance survey maps are easily available - there's really no excuse to go out walking!