A report about the lower San Pedro Valley in Arizona. This report shows how mapping discrete units of the valley may lead to a broadened understanding of Cenozoic history of intermontane basins in Arizona.

From introduction: The present study was undertaken to extend and supplement a mapping program covering several ranges north and northwest of Lake Mead.

Report issued by the Bureau of Mines over drilling and sampling of the San Manuel copper mine in Arizona. Properties of the drill samples are presented. This report includes tables, maps, and illustrations.

From introduction: "The purpose of this report is to show how mapping of discrete units of the valley fill may lead to a broadened understanding of Cenozoic history of intermontane basins in Arizona. The area described is in the vicinity of Mammoth Arizona where deep dissection has exposed a complex sequence of terrestrial deposits and related rocks."

Report issued by the U.S. Bureau of Mines discussing copper mining methods and costs in Gila County, Arizona. As stated in the introduction, "this report reviews the underground mining method with emphasis on data and mechanics of block caving as exposed by the open-pit work. It describes the current operating and engineering practice in the open-pit mine with particular emphasis on physical, economic, engineering, and management factors that have affected the choice of mining method and equipment" (p. 1). This report includes maps, tables, illustrations, and photographs.

Report issued by the U.S. Bureau of Mines discussing water requirements and consumption used in Arizona mineral industries. As stated in the summary, "this report describes the effects of water shortage on Arizona's mineral industries" (p. 1). This report includes maps, tables, illustrations, and photographs.