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Coal Geology Administration

coal colorado geological survey,coal, a black-to-brown rock, is the end product of this diagenetic process. the more complete the process, the higher the grade, or rank of the coal. texturally, coal is subdivided into four main classes lignite, sub-bituminous, bituminous, and anthracite. this last class is the hardest coal.biden administration launches review of coal minings,aug 19, 2021 by matthew brown, the associated press billings, mont. u.s. officials launched a review thursday of climate damage and other impacts from coal mining on public lands as the biden administration expands its scrutiny of government fossil fuel sales that contribute to greenhouse gas emissions. the review also will consider if companies are paying fair value for coal extracted from.

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