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.

This index provides a list of mines within each mineral district as defined in Arizona Bureau of Geology and Mineral Technology- Map 18 and Bulletln 194 (Kelth and others, 1983a,b). In a m1neral-district classification known metallic mineral occurrences are grouped according to geologic and metallogenic criteria rather than the geographic associations used in the traditional mining-district approach. Ideally, a mineral district should consist of mineral occurrences that have a common origin. A mineral-district classification is especially useful for understanding the geologic setting of mineralization and the distribution of known mineral occurrences with similar geology. A mineral-district map, however, is not a map of mineral potential. Although understanding the distribution of known mineral deposits is essential in evaluating mineral potential, many other geologic factors must also be considered (Fellows, 1984).

This is the 4th and latest compilation of the Geologic Map of Arizona published in 2000 at 1:1,000,000 map scale. Released online on 19 January 2017

Geologic map of Arizona ca. 1988. This is the 3rd statewide geologic map of Arizona published by the Arizona Geological Survey or its predecessors.

The Arizona Geological Survey (AZGS) has been compiling a statewide landslide database for hazard mitigation planning. The AZ Statewide Landslide Inventory Database (AZSLID) contains landslide and mass movement data from published maps and reports as well as newly documented slides identified while building the database. The proximity of landslides to critical infrastructure, utilities, and populated areas is important information not easily accessible prior to creation of the database. AZSLID will be useful to state, local, county, and tribal governments for hazard mitigation and planning purposes.

Field-based geologic mapping has identified one large central volcano and 84 small volcanoes and intrusions in an area of 180 mi2 (470 km2) on and near the Mogollon Rim in the north part of Verde Valley, Arizona. Geographic coherency of the volcanic structures and alkaline lava compositions that are markedly undersaturated in silica characterize this volcanic terrane, which, informally, is named the north Verde volcanic field. The volcanic field projects into the Arizona Transition Zone from the southern Colorado Plateau as an alkaline appendage of the basaltic Mormon volcanic field. Transitional and subalkaline igneous-rock series are also represented. Ages of the volcanic rocks are Middle to Late Miocene.