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
Dictionary of Mining, Mineral, and Related Terms