Otto C. Kopp
Contributor
Professor Emeritus of Geological Sciences, University of Tennessee, Knoxville.
Primary Contributions (11)
Brown coal, broad and variable group of low-rank coals characterized by their brownish coloration and high (greater than 50 percent) moisture content. These coals typically include lignite and some subbituminous coals. In Great Britain and other countries, the term brown coal is used to describe…
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