Category:Mining in Powder River Basin
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This category has only the following subcategory.
Media in category "Mining in Powder River Basin"
The following 3 files are in this category, out of 3 total.
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Coal Miner Laser Profiling.png 2,400 × 3,600; 16.67 MB
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Coal Stratigraphy Powder River Basin.png 1,475 × 1,725; 58 KB