Manganese Deposits of Western Arizona I.C. 7843 (1958)

Gold Mining and Milling in the Black Mountains, Western Mohave County, Arizona I.C. 6901 (1936)

Map detailing the distribution of metallic mineral districts in Arizona. 1:1,000,000. Color-coded by commodity and setting.

Radon is a colorless, odorless, radioactive gas produced by the decay of uranium, which is present in virtually all rocks and soils, typically at concentrations of 1 to 4 parts per million (ppm). Radon can accumulate inside homes and other buildings at concentrations that are commonly tens of times greater than in outdoor air and, in some cases, may be hundreds or even thousands of times greater. Most indoor radon is derived from uranium in underlying soil and rock and gradually seeps into buildings through cracks or other openings in the ground floor. Houses with unusually high concentrations of indoor radon are typically built on rock and soil that contain unusually high uranium concentrations.

Phil Anderson's maps of the Proterozoic of the Bradshaw Mountains of central Arizona's Transition Zone with a forward and note of explanation by Steve Reynolds and others. From Reynolds and others forward, "Phillip Anderson conducted a comprehensive study of the Proterozoic geology, tectonics, and mineral deposits of the Southwest, focused on Arizona ... . In total, the Phillip Anderson Arizona Proterozoic Archive represents the most significant collection of geologic maps ever released for the Proterozoic of Arizona."

This bulletin constitutes part of a general report on the zinc and lead deposits in Arizona. It includes much new information as well as some material compiled from published sources. Descriptions of several districts and mines not included by this Part I have been prepared for subsequent publication, and others are in course of preparation. Appreciative acknowledgment is made to the mining companies, mine operators, U. S. Geological Survey, and others for furnishing information. Their generous co-operation is further indicated by the list of authors who contributed articles for this bulletin. PRODUCTION SUMMARY. Arizona's output of zinc and lead has increased remarkably since 1933, as shown by Figure 1; approximately' 85 per cent of the total zinc and 57 per cent of the total lead were mined during 1934-49.

E.D. Wilson's 1937 Ph.D. Dissertation, Harvard University, MA. Dr. Wilson was a senior geologist at the Arizona Bureau of Mines for many years. Rocks which have been classified as pre-Cambrian are very prominent in Arizona, as indicated by the State Geologic Map. The most complete sequences of so-called Archean and Algonkian types known in the Southwest crop out in the Grand Canyon. Formations of known or supposed pre-Cambrian age constitute about half of the visible rocks in the State's numerous widely distributed mountain ranges which are largely isolated from one another by basins underlain with Tertiary and Quaternary beds. Arizona’s greatest exposures of pre-Cambrian sedimentary and volcanic rocks are in the central mountain ranges, within distances of 90 to 200 miles from the Grand Canyon. This central region has yielded approximately 1500,000,000 worth of copper, gold, silver, lead, and zinc, mainly from the Jerome pre-Cambrian deposit and partly from numerous Mesozoic or Tertiary veins in pre-Cambrian host rocks whose salient controlling structures appear largely to be heritages from pre-Cambrian events.

This bulletin, a supplement to Arizona Bureau of Mines Bulletin 173, presents a comprehensive listing of the literature on the geology and mineral resources of Arizona released since January, 1965, through December, 1970. In compiling the list, the authors have used freely the several bibliographies of North American geology, issued as bulletins by the U. S. Geological Survey, and the U. S. Bureau of Mines List of Publications. In addition, many serials and irregularly issued publications have been examined and applicable articles noted.

Geothermal resources map of Arizona. Map scale 1:500,000. Building this was a collaborative effort involving: Arizona Geological Survey, National Geophysical and Solar Terrestrial Data Center, NOAA, US Dept. of Energy.

Landslides in Arizona are an under-appreciated geologic hazard. Prior to this project, the nature and extent of landslides was limited to an incomplete array of geologic maps and reports. To address this knowledge and data gap, the Arizona Geological Survey (AZGS) initiated a Landslides Hazards Program. Working with our partner agency, the Arizona Division of Emergency and Military Affairs (DEMA), we compiled the first comprehensive landslide inventory for the State of Arizona.