The rocks of the Bisbee Quadrangle consist of a basement of Precambrian quartz sericite schist overlain by 1,600 to 2,000 meters......
Hundreds of caves were found while mining the rich oxide copper ores in Bisbee. Often these openings were beautiful beyond description....
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General geology map of the Warren Mining District
Image of important and interesting geological features in the Warren mining District
This section is look at Bisbee's paleo climate and environmental changes through geological time. This is meant for middle school age level.