Remarques sur les rides sous-marines : théorie de la formation des rides

Numerous laboratory studies have been done on the formation and on the evolution of sand ridges. Durand (1951) studied the formation of ridges in channels. He showed that when a sand grain from the transport layer in direct contact with the bottom comes to rest, it has a tendency to stop all the other particles coming from upstream at the same level. The upper layers are slowed in succession and it is as if an additional layer had been added, with this layer being made up of particles taken from the permanent sediment discharge of higher regions in saltation....