a. Term used for sapropelic coal containing spores, in contrast to sapropelic coal containing algae, which is termed boghead coal. Viewed microscopically, cannel coal shows no stratification. It is generally dull and has a more or less pronounced waxy luster. It is very compact and fractures conchoidally. There are transitions between cannel coal and boghead coal, and it is not possible always to distinguish macroscopically between them. Such a distinction can, however, be easily made a with microscope, except in high-rank coals. In American nomenclature, cannel coal must contain less than 5% anthraxylon. Cannel coal occurs in layers or lenses up to several centimeters in thickness. Thin seams consisting entirely of cannel coal are known. It occurs widely but in limited amounts. Syn: gayet See also: sapropelic coal; spore coal; boghead coal. IHCP
b. A variety of bituminous or subbituminous coal of uniform and compact fine-grained texture with a general absence of banded structure. It is dark gray to black in color, has a greasy luster, and is noticeably of conchoidal or shell-like fracture. It is noncaking, yields a high percentage of volatile matter, ignites easily, and burns with a luminous smoky flame. Syn: canel; cannel; candle coal; kennel coal.
Source:
Dictionary of Mining, Mineral, and Related Terms












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