Channels up to twenty meters deep occur in three turbidite-bearing formations of upper Carboniferous age in North Derbyshire and North Devon in England. Some are single cuts, but many show repeated cutting and filling. The wall slopes ordinarily are gentle, but may be as much as 70 degrees . The channel fills generally are thick sandstones, but in three mudstone-filled channels the fill and the pre-channel sediments belong to the same facies. Fast underladen turbidity currents probably eroded the channels, although some of the channels may be slump scars. The presence of such deep channels in turbidite-bearing formations is paleogeographically significant.