Above: White Sands National Monument near Alamogordo, NM.  The dunes are white because they are made up almost entirely of the mineral gypsum.  Photo credit, David Moss. 

Have a question?  Contact me using the info or form below.
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​David K. Moss
Assistant Professor
Sam Houston State University
Department of Geography and Geology
​Huntsville, TX 77341
P.O. Box 2148
email: dxm112@shsu.edu
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