(Jon of the Clue Crew holds a white rock at White Sands National Monument, New Mexico.)  Because it's water-soluble, this form of calcium sulfate is rarely found in sand, but here in New Mexico's Tularosa Basin, there are no rivers to carry it away, so it forms the famed white sand
[DOC] [TLE] Geology of White Sands - White Sands National Monument (U.S. ... [PAR] Today, white bands of gypsum can be seen in the surrounding mountains.