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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 Map of Principal Claims and Workings in Central Part of Tombstone District Centurion Mine Map Figure 10 Scribner and Taylor Mines, Underground Workings Herschel Mine Shaft Map Superior & Pittsburgh Co. Junction Geologic Map Level 1500 Floor 2 Superior & Pittsburgh Co. Junction Geologic Map Level 1400 Floor 5 Superior & Pittsburgh Co. Briggs Geologic Map Level 1400 Floor 11 Superior & Pittsburgh Co. Cole Shaft Level 1300 Sec 4 Superior & Pittsburgh Co. Cole Shaft Level 1000 Sec 4 Glance Creek Area, Surface Map, State Lease No 2 & 3, Map 1 Geologic Map of a Portion of Cochise County Superior & Pittsburgh Co. Junction Geologic Map Level 1400 Floor 2 Section N 55 deg W through Junction South Orebody Longitudinal Projection through Oregon and Prompter Mines Old Guard and Herschel Map Contention, Section through West Side Shaft and Pump Shaft North-South Section Through Centurion Shaft Hilltop Mine Gray Tunnel Grover Heinrichs mining collection: Black Bear Group