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Improved Geologic Map of Arizona Online Map Service
AZGS launched an enhanced enhanced and improved online geologic map of Arizona.
Ray Grant presents "Mineralogy of Arizona" 4th Edtn.
Ray Grant presents Mineralogy of Arizona in 52-minute video.
Helium exploration and exploitation in the Holbrook Basin, Arizona
Helium exploration and exploitation in the Holbrook Basin, Arizona on YouTube.
Organ Pipe Cactus National Monument established 13 April 1937
Recent AZGS publications focusing on the geology of the Organ Pipe Cactus National Monument.
Geology & Geochronology of four 7.5' quadrangles straddling the southern border of AZ - CA
New Contributed Report on the geology and geochronology of four 7.5’ quadrangles in SW Arizona and SE California.
Karst Features on the Tonto National Forest
Karst features of the Tonto National Forest, Arizona
Small earthquake swarm detected near Roosevelt, Arizona: Feb. 25, 2022
Small swarm of earthquakes occur near Theodore Roosevelt Lake of central Arizona in February 2022.
Mining history of Globe-Miami area, Arizona
New 243-page report on the geology and mining history of Globe-Miami area, central Arizona.
Directory of Arizona's Active Mines-FY2021

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.

Celebrating the life and career of Paul J. Umhoefer (1955-2021)
We are heartbroken by the news that Paul John Umhoefer (Ph.D.) passed away on November 24, 2021, in Flagstaff, AZ, at the age of 66.
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