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Bituminous coal, or black coal, is a relatively soft coal containing a tar-like substance called bitumen or asphalt. Its quality is ranked higher than lignite and sub-bituminous coal, but poorer than anthracite. Formation is usually the result of high pressure being exerted on lignite. Its coloration can be black or sometimes dark brown; often there are well-defined bands of bright and dull material within the seams. These distinctive sequences, which are classified according to either "dull, bright-banded" or "bright, dull-banded", is how bituminous coals are stratigraphically identified.

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  • Bituminous coal
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  • Bituminous coal, or black coal, is a relatively soft coal containing a tar-like substance called bitumen or asphalt. Its quality is ranked higher than lignite and sub-bituminous coal, but poorer than anthracite. Formation is usually the result of high pressure being exerted on lignite. Its coloration can be black or sometimes dark brown; often there are well-defined bands of bright and dull material within the seams. These distinctive sequences, which are classified according to either "dull, bright-banded" or "bright, dull-banded", is how bituminous coals are stratigraphically identified.
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