In Dr. Dieter Noli words, “The mining site concerned was actually located in the surf zone, where the violent action of the waves theoretically made mining impossible.” “So what the chaps do is push up a huge sea-wall with bulldozers parallel to the beach, with the ends running back to the beach. The result is a large man-made lagoon, with the surf pounding on the outside. Then they pump the sea-water out of the lagoon.”