Geography of Dorset is the Blackmore Vale, a relatively low-lying area of clays and limestones of Jurassic age. The south-east of the county forms part of the Hampshire Basin, an asymmetric syncline covered in sands and gravels of Paleogene age. The main rivers in the county are the Stour, Frome and Piddle. The Stour is the county's largest river, although its source is in the neighbouring county of Wiltshire. The Frome and Piddle both lie wholly within the county. The whole of Dorset's coastline is designated part of the Jurassic Coast World Heritage Site, and contains examples of many different coastal landforms, reflecting
East Devon AONB East Devon AONB East Devon Area of Outstanding Natural Beauty (AONB) covers over of the East Devon countryside (England). This countryside includes eighteen miles (29 km) of Heritage coastline. The designated area covers: twenty-nine parishes and borders the coastal towns of Exmouth, Seaton and Sidmouth but includes the entire resort of Budleigh Salterton. East Devon has two AONBs within its catchment area which includes the Blackdown Hills (designated 1991) and East Devon AONB (designated 1963), both AONBs make up over 66% of the district. East Devon AONB Partnership is a joint initiative funded by Defra (Department for Environment, Food and