Readme file for supplemental sheets 1 and 2 taken from OFR 2012–1105 poster.
    
    Rockwell and Hofstra (2009a) published preliminary results of a mineral mapping survey in southwestern Utah derived from
 spectroscopic analysis of digital imagery acquired by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER)
 sensor.  
    

    This report provides a poster with updated mapping results of clay-sulfate-mica-carbonate minerals and added ferric iron occurrence
 in printable and zoomable Portable Document Format (PDF).  Two versions of the poster are provided that vary in file
 size and image quality related to the type of JPEG2000 compression.  The version with the smaller file size (71.4 MB) was
 produced with maximum quality compression, and is designed for faster download, viewing, and printing.  The version with the
 larger file size (239 MB) was produced with lossless compression and is optimal for detailed, zoomed viewing and high-quality printing.

    Digital maps in geospatial PDF format are also provided that show the ASTER-derived interpretive data from the poster.  These
 maps are designed for field work on portable computers.  The geographic coordinates of any location in the maps will be displayed
 at the lower right of the Acrobat Reader window.  Sheet 1 shows the mineral mapping derived from analysis of the ASTER VNIR and
 SWIR data (central poster frame).  Sheet 2 shows the quartz and carbonate mapping derived from analysis of TIR data (right-hand
 poster frame).
    
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Rockwell, B.W. and Hofstra, A.H., 2009a, Mapping argillic and advanced argillic alteration in volcanic rocks, quartzites, and
quartz arenites in the western Richfield 1° x 2° quadrangle, southwestern Utah, using ASTER satellite data (abstract): Geological
Society of America Rocky Mountain Section Meeting Abstracts with Programs, Orem, Utah, May 11–13, 2009, v. 41, no. 6, p. 39.
(Also available at http://gsa.confex.com/gsa/2009RM/finalprogram/abstract_157802.htm.)