CULTURAL RESOURCES SURVEY OF THE PROPOSED EXPANSION OF THE DIABLO SAND AND GRAVEL PIT, PINAL COUNTY, ARIZONA By Wesley D. Miles and M. Scott Thompson GEOGRAPHIC PROVENANCE ANALYSIS OF OBSIDIAN ARTIFACTS FROM GILA CROSSING, GR-1112, MARICOPA COUNTY, ARIZONA By Chris Loendorf Contributions by Craig Fertelmes Lynn Simon pXRF Technical Report 2018-05 Gila River I ndian Community Cultural Resource Management Program Sacaton, Arizona 2018