A sample of lignite coal. Typically referred to as "brown coal," lignite coal is formed as a result of naturally compressed peat. Due to its moisture, its low carbon content makes it less sought after than anthracite or bituminous coal, but it has still historically been used in the generation of electricity. | Creator: United States Geological Survey | Date: ca. 2013 | Source: https://www.usgs.gov/media/images/lignite-coal-0Download Original File
