We come into view of the "boucans" or beds of lignite coal which have been continuously burning here since Mackenzie saw them in 1789 and mistook their smoke for tepee fires.
"The New North"
Agnes Deans Cameron
Associated with the stumps and overlying them, are lignite beds with fresh-water shells of recent species, and laminated clay without fossils.
"The Student's Elements of Geology"
Sir Charles Lyell
Some of the most valuable peat closely resembles lignite, and makes a good fuel.
"Geology"
James Geikie