Boghead coal

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  1. A variety of bituminous or subbituminous coal resembling cannel coal in appearance and behavior during combustion. It is characterized by a high percentage of algal remains and volatile matter. Upon distillation it gives exceptionally high yields of tar and oil. See also: cannel coal; torbanite; kerosine shale.
  2. A nonbanded coal with the translucent attritus consisting predominately of algae, and having less than 5% anthraxylon. AGI

Source: Dictionary of Mining, Mineral, and Related Terms

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