Anthracite from Rocky Mountains, North America
USA | |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| U.S. Geological Survey Photographic Library |
USA | |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| U.S. Geological Survey Photographic Library |
Upper Bankhead Trail, Bankhead Coal Mine, Bankhead, Banff National Park, Alberta, Canada