Geochemical map of the Rattlesnake Roadless Area, Coconino and Yavapai counties, Arizona

The geochemical survey of the Rattlesnake Roadless Area was conducted in May 1982 by the U.S. Geological Survey to aid in a mineral resource appraisal of the area. A total of 114 stream-sediment samples, 68 heavy-mineral concentrates from stream sediment, 20 rock samples, and 4 water samples was collected by S.C. Rose, D.E. Hendzel, and W.J. Gerstel, with helicopter support from Jack Ruby, pilot for Helicopters Unlimited. All sample localities are plotted on the map; sample localities showing anomalous barium and lead are also indicated on the map.