New Mexico lies in the American Southwest. Plateaus, mountains, river valleys and basins continually change its landscape. In the south, White Sands offers a particularly striking departure from familiar images of the desert.
White Sands consists mainly of gypsum grains. Evaporite deposits left by ancient seas moved into the basin through geological change and water transport. Ancient Lake Otero and later deposits supplied much of the material for today's dunes.
Crystallized gypsum breaks apart, and the wind shifts and rearranges the particles to form undulating sand dunes. The sunset colors the white sand with warm hues, and this gives the day and the evening a different texture.









