Abstract
Since 1952, geological mapping of the continental shelf around southern Britain has been carried out with echo-sounders, and more recently by the echo-ranging equipment on R.R.S. Discovery II, which produces acoustic maps of the sea floor. The character of the superficial sediments is here interpreted in terms of sedimentation processes and it is argued that these are controlled by the strong tidal currents. Regions of deposition and their supply paths are indicated and it is shown that only one sand stream is heading for the deep sea floor. The subsequent history of land deposits after a marine transgression and of younger material on present-day current-swept sea floors is stated and the facies that are being produced are mentioned.