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A coal-lignite-fire clay deposit/mine located in sec. 4, T6N, R9E, MDM, 1.6 km (1.0 mile) SE of
Brown coal open pit mine Stock Photo - Alamy
Operations - Foresight Energy
Coal and the Coal Mines, by Homer Greene—A Project Gutenberg eBook
Coal and the Coal Mines, by Homer Greene—A Project Gutenberg eBook
Lot 232 Lignite pit (Coal Mine No. 4), Carbondale, Irish Hill
Irish Hill Mining District, Amador County, California, USA
Geology of The Sierra Nevada - Revised Edition, PDF
Carbondale's deep scar
Workers, communities fear closing North Dakota's largest coal
Knight Hawk Coal Creek Paum Illinois Coal Mine Facility
Operations - Foresight Energy
Illinois AG sues Sugar Camp mine near Benton over 'misuse of
Irwindale Mining Pit - Geocon, Inc.
Utah coal mine has emitted methane in the decade since it idled
Operations - Atlantic Carbon Group