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The 'Black Bear Group' 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.


map background search result map search result map Sketch of Workings between Silver Thread 400 and Empire 300 Lucky Cuss Geology Pump Shaft 2nd Level, Workings and Geology Vizina Underground Workings and Tombstone Surface Plan Abril Mine Townsite and Corporate Limits of Bisbee and Copper Queen Claims Superior & Pittsburgh Co. Hoatson Shaft Level 1500 Floor No. 10 Dry Hill Mine Map Junction Mine Superior & Pittsburgh Co. Copper Co. Section 6 Level 1200 Lone Star Mine Superior & Pittsburgh Co. Cole Geologic Map Level 1000 Floor 8 Superior & Pittsburgh Co. Cole Shaft Level 1000 Sec 3 Carper Mine Plan and Notes Superior & Pittsburgh Co. Cole Geologic Map Level 900 Floor 1 Sec 4 Superior & Pittsburgh Co. Hoatson Shaft Level 1400 Floor No. 7 Superior & Pittsburgh Co. Cole Geologic Map Level 1000 Floor 7 Gallagher Vanadium Area Geology and Assay Map Sheet 1 with Additions Grover Heinrichs mining collection: Black Bear Group USGS Topo Map Vector Data (Vector) 18694 Guadalupe Spring, New Mexico 20170421 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 18694 Guadalupe Spring, New Mexico 20170421 for 7.5 x 7.5 minute FileGDB 10.1