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Coal mine
TOPA open-pit coal mine, Jharkhand, India. Laterally extensive coal seams represent a significant reserve of fossil fuels. No modern analogue can be offered as a counterpart to some of these ancient beds.
Rt139 MesaVerdeFmBurntOrganics
ENERGY SOURCES: Mesa Verde Formation, Rt.139 south of Rangely --- Coal seams in this formation ignite and burn, baking to a bright red nearby shale and sandstone layers.