MemoryStone

N.M. cavers chart unique `snowy’ river of crystals

Caver John McLean talks about the many questions scientists have about the Snowy River formation while on an expedition in Fort Stanton Cave, N.M., on July 3, 2008. New Mexico’s two U.S. senators have proposed legislation to designate the cave and Snowy River as a national conservation area. (AP Photo/Susan Montoya Bryan)