spectra. THERMAL INFRARED AND VISIBLE TO NEAR-INFRARED SPECTRAL ANALYSIS OF CHERT AND AMORPHOUS SILICA. M. L. McDowell, V. E. Hamilton, S. L. Cady, and P. Knauth. Hawai’i Institute of Geophysics and Planetology, University of Hawai’i, 1680 East-West Rd, Honolulu, HI 96822 ([email protected]), Southwest Research Institute, Boulder, CO, Portland State University, Portland, OR, Arizona State Uni...