The west of the county lies on more resistant Cretaceous chalk. This chalk is responsible for a sweeping tract of largely downland landscapes that stretches from Dorset in the south west to Dover in the south east and north through East Anglia to the Yorkshire Wolds. The chalk is less easily eroded so forms the only significant hills in the county. The highest point in the county is Great Wood Hill, the highest point of the Newmarket Ridge, near the village of Rede, which reaches .