The East Anglia Region - Southern England - page 239

FIG 225. Generalised near-surface bedrock succession for the East Anglian Region.
FIG 226. Bedrock map of the East Anglian Region with hillshade.
About 200 million years ago, as Jurassic times began, the sea invaded East Anglia
and established a marine gulf between the London Platform to the southeast and other
areas of low hills in Wales and the West Country to the north and west (Fig. 227). The
position of this Jurassic gulf is now marked by the presence of bedrock of Jurassic age