gypsum

White Sands National Monument in New Mexico by JD Andrews

The White Sands National Monument -

Beautiful dunes of gypsum cover 275 square miles of desert, creating the world's largest gypsum dune-field.

Located about 16 miles southwest of Alamogordo in New Mexico - elevation 4,235 feet

official website: White Sands

Sunset on the Serene Desert Sands made of Gypsum - New Mexico by JD Andrews

The White Sands National Monument

White Sands National Monument - New Mexico by JD Andrews

The world's largest gypsum sand dune field - 275 square miles.