The Côte d'Albâtre (Alabaster Coast) extends over nearly 80 miles (130 km). Its wild cliffs delimit the Pays de Caux from Le Havre (west), drop at Dieppe, and go up to Petit Caux, at Le Tréport (east). The coast has been listed as Natura 2000 since 2009. The cliffs alternate between layers of hard flint, yellowish marl, and milky chalk that melt in the water. Erosion leaves flint pebbles on the foreshore that long served as building materials for the Normans. Once powdered, they are also used in the manufacture of porcelain or as an additive to toothpaste.