Show pebble industry tn in normandy the peb pebble ble industry Is IB becoming becomer AA quite important in upper normandy france the cliffs ot of the caux region undermined by subterranean springs and by the waves of the english channel slip fall all and break they are formed ot of a calcareous mass maas containing flints these flints tall fall to the bottom ot of the sea where here they become flat und and take an ovoid shape their color Is blue spotted iab sith brown yellow or red stripes they are used to manufacture concrete stone and earthenware and their dust Is even employed to make and rice powder imitation over tons of pebbles are an dually picked up on the bonnand Non nand beaches most of it Is sent abroad if |