Filters: Tags: Pima332 (X)
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Heinrichs Geoexploration Co. Maps: Twin Buttes Area; 1 in. to 500 feet; 19 x 32 in.
Heinrichs Geoexploration Co. Maps: Twin Buttes I.P. Survey Location Map; 1 in. to 500 feet; 19 x 33 in.
Heinrichs Geoexploration Co. Maps: Twin Buttes Area Gravity Survey; 1 in. to 500 feet; 20 x 34 in.
Heinrichs Geoexploration Co. Maps: Twin Buttes Area, I.P. Line 1; 1 in. to 1000 feet; 28 x 16 in.
Heinrichs Geoexploration Co. Maps: Twin Buttes Magnetic Survey Total Intensity; 1 in. to 500 feet; 19 x 33 in.
Heinrichs Geoexploration Co. Maps: Geochemistry Profile Along I.P. Line 1; 1 in. to 750 feet; 15 x 11 in.
Heinrichs Geoexploration Co. Maps: Twin Buttes Gravity Survey; 1 in. to 500 feet; 20 x 46 in.
The 'Pima Mines District Twin Buttes Mine Aerial Photos' file is part of the Grover Heinrichs mining collection. Grover was the Vice President of Heinrichs GEOEXploration, located in Tucson, Arizona. The collection contains over 1,400 folders including economic geology reports, maps, photos, correspondence, drill logs and other related materials. The focus of much of the information is on the western United States, particularly Arizona, but the collection also includes files on mining activity throughout the United States, foreign countries, and 82 mineral commodities.
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