Arizona's Historic Earthquakes  -  The southwestern part of this state is not far from the San Andreas fault system, and indeed some related fault structures must now underlie this region. Yuma has felt tremors on several occasions from disturbances…

Fifteen miles south of Florence, Arizona, preparations for a unique drill hole were completed in late February. The drill hole is unprecedented in its physical dimensions. It will likely smash the Arizona depth record of 12,500 feet set in 1972 by Exxon, 15 miles southeast of Tucson.

From alabaster to zinc, this is the earliest volume of Arizona minerals and rocks published by the Arizona State Bureau of Mines. Rough locations are provided for each entry. The first formal publication of an Arizona Geological Survey predecessor agency began in 1915 while Charles Willis was director. 

Identification of truly thermal springs is an indispensable aid in the assessment of a region's geothermal characteristics. Over the years numerous lists of thermal springs in Arizona… 

It was 1943 and World War II raged on and Allied Forces were on the offensive in the Pacific and European theaters. Back home mineral exploration for critical minerals was essential to the war effort. As part of this effort, geologists of the Arizona Bureau of Mines meticulously mapped the geology of the copper-rich Superior mining area of Arizona. 

In a jargon-free article written for the general public, former Arizona Geological Survey Director Larry Fellows summarizes the nature and societal scope of geologic hazards in Arizona.