This report presents engineering data, statistics, and individual borehole histories of the 28 holes drilled in this project.

From abstract: This report presents the results of the geochemical reconnaissance sampling in the Prescott quadrangle of the National Topographic Map Series (NTMS). Wet and dry sediment samples were collected throughout the 18,770 square kilometer arid-to-semiarid area and water samples at available streams, springs, and wells.

"This report presents engineering details, statistics, and individual borehole histories of the 27 holes drilled for this project." (from Introduction)

From purpose of study: The Vallecito Conglomerate of the Needle Mountains area in southwestern Colorado was studied to evaluate the uranium potential of the unit and to test the applicability of the uraniferous Precambrian pebble-conglomerate exploration model in this area. The main thrust of this project is the Vallecito Conglomerate, but the Uncompahgre Formation, which is also in the Needle Mountains area has basal conglomerate that was investigated in a reconnaissance mode. Five specific objectives have been formulated to meet the overall purpose of this project, and these include: a) Determine the uranium distribution in the Vallecito Conglomerate and the basal conglomerate of the Uncompahgre Formation. b) Evaluate the uranium resources of the area to the degree possible utilizing available information and personal field investigations. c) Test the validity of application of the Precambrian quartz-pebble conglomerate model to this area. d) Recommend detailed studies and delineate drilling sites in the area to further evaluate the uranium resources if warranted. e) Recommend additional geologic, geophysical and geochemical studies which would bear directly on evaluation of uranium resources of the Precambrian pebble conglomerates in the Needle Mountains area.