Geography
The South Downs dominate Eastbourne and can be seen from most of the town. These were originally chalk deposits laid down under the sea during the Upper Cretaceous period, and were later lifted by the same tectonic plate movements that formed the European Alps, during the middle Tertiary period. The chalk can be clearly seen along the eroded coastline to the West of the town, in the area known as Beachy Head and the Seven Sisters, where continuous erosion keeps the cliff edge vertical and white. The chalk contains many fossils such as ammonites and nautilus. The town area is built on geologically recent alluvial drift, the result of the silting up of a bay. This changes to Weald clay around the Langney estate.
A part of the South Downs, Willingdon Down is a designated Site of Special Scientific Interest. This is of archaeological interest due to a Neolithic camp and burial grounds. The area is also a nationally uncommon tract of chalk grassland rich in species. Another SSSI which partially falls with the Eastbourne district is Seaford to Beachy Head. This site, of biological and geological interest, covers the coastline between Eastbourne and Seaford, plus the Seven Sisters country park and the Cuckmere valley. Several nature trails lead across the Downs to areas such as the nearby villages of East Dean and Birling Gap, and landmarks like the Seven Sisters, Belle Tout lighthouse and Beachy Head.
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