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brown coal

brown coal Brown to brownish-black fossil fuel of low rank, intermediate between peat and lignite. It is soft, with a dull lustre and earthy texture, and contains the remains of plants; has a high moisture content (45–66%), and decomposes and darkens on dehydration. Its ash content is 1–5%, and its calorific value varies from low in soft, high-moisture types to high in those resembling lignites. It comes mainly from east and central Europe, where it is mined from open-cast pits.

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"brown coal." A Dictionary of Earth Sciences. . Encyclopedia.com. 16 Dec. 2017 <http://www.encyclopedia.com>.

"brown coal." A Dictionary of Earth Sciences. . Encyclopedia.com. (December 16, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/brown-coal

"brown coal." A Dictionary of Earth Sciences. . Retrieved December 16, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/brown-coal

brown coal

brown coal: see lignite.

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"brown coal." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. 16 Dec. 2017 <http://www.encyclopedia.com>.

"brown coal." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (December 16, 2017). http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/brown-coal

"brown coal." The Columbia Encyclopedia, 6th ed.. . Retrieved December 16, 2017 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/brown-coal