Brown coal (lignite). This form of coal has a high moisture and ash content, and is a more polluting form of coal than the higher (black) grades of co

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Brown coal (lignite). This form of coal has a high moisture and ash content, and is a more polluting form of coal than the higher (black) grades of coal. It is a sedimentary form of carbon, and the layers of compressed organic matter can be seen in this sample.

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Size: 5138px × 3425px
Photo credit: © DIRK WIERSMA/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: brown, carbon, coal, dirty, earth, energy, fossil, fossilised, fuel, fuels, geological, geology, grade, layer, layers, lignite, mineral, mineralogy, miocene, polluter, polluting, rock, rocks, sample, science, sedimentary