White Sands is 275 square miles of crushed Gypsum. Mineral rich mountains surround the vast basin in the Chihuahuan Desert. As it rains the water runs down the mountain sides filled with hydrous calcium sulfate (yes i looked that up) the basin filters the water and as the deposit dries it forms crystals. The strong winds in the are break bits off the crystal deposits and steadily tumble it till its a fine sand. Resulting in the dunes.
|White Sands Visitor Centre|