AZGS' Open-File Report 'Directory of Active Mines in Arizona: FY2021' documents 433 active, full-time mines or development projects in the state of Arizona. Mines come in all shapes and sizes, from small sand and gravel operations providing materials for local road maintenance and construction to the large open-pit copper mines, such as Morenci and Ray.
Wretched as 2020 has been, and continues to be, the holiday season has arrived. For those looking for a gift with geologic overtones, we’ve compiled a list of some of our favorite geologic books, field trips guides, and maps that are in-print or free as digital downloads.
Best wishes finding precisely what you need.
In March 2019, President Donald Trump signed a public lands bill creating the Santa Cruz Valley National Heritage area encompassing parts of Santa Cruz and Pima Counties. This followed more than a decade of effort on the part of U.S.