from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A variety of coal, derived from colonial algae, that looks like carbonaceous shale
from The Century Dictionary and Cyclopedia
- n. Boghead coal. See coal.
Sorry, no etymologies found.
Permian kerogens from Autun, Fr., and Carboniferous and Permian torbanite from Scotland, Australia, and South Africa appear to consist almost exclusively of Botryococcus colonies, as does Recent post-Pleistocene coorongite from