Figure 17. Bottom map is a subset of Plate 2 over the Winnemucca Dunes, Silver State Valley, Humboldt County (D, Fig. 6). Detected quartz is shown in red. Image at top shows Landsat Thematic Mapper data from the U.S. Geological Survey Seamless Data Distribution System (bands 4,3,2/R,G,B). Note correspondence of white to light gray dunes in top image to detected quartz. See Figure 5 for an ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) emissivity spectrum of the dunes. To access a full-resolution PDF of this figure, please visit http://dx.doi.org/10.1130/GES00126.S16 or the full-text article on www.gsajournals.org.