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
Dorset dialect England on the English Channel coast. It borders Devon to the west, Somerset to the north-west, Wiltshire to the north-east, and Hampshire to the east. The Dorset dialect is derivative of the Wessex dialect which is spoken, with regional variations, in Dorset, Wiltshire, Somerset and Devon. It was mainly spoken in the Blackmore Vale in North Dorset, not so prevalent in the south of the county and less so in the south-east, which was historically in Hampshire prior to local government re-organisation in 1974. The Dorset dialect stems from the ancient Norse and Saxon. The Saxon invaders that landed in