Bunter beds are sandstone deposits containing rounded pebbles, such as can notably be found in Warwickshire, Cheshire, Staffordshire, Nottinghamshire, Devon and Dorset in England. They are thought to be alluvial deposits and, judging from the rounding of the mainly quartzite pebbles, to have resulted from prolonged transportation in a large and turbulent river, resulting in powerful abrasion. The deposits in the English Midlands are thought to have been transported in this way Northwards from Brittany, France.