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 Dorset East Dorset East Dorset is a local government district in Dorset, England. Its council is based in Wimborne Minster since 2016. The district was formed on 1 April 1974 by the merger of Wimborne Minster Urban District with part of the Ringwood and Fordingbridge Rural District and the Wimborne and Cranborne Rural District. The district was originally known as Wimborne, and adopted its present name in 1988. The popularity of the area, being close to the New Forest, Bournemouth and the Dorset coast, has seen a rapid expansion in housing from the 1970s with the Verwood, Ferndown, West Moors and