Coal AAPG Wiki
Aug 15, 2016#0183;#32;Coal is a rock that contains greater than 50 wt. % organic matter. Most coals in North America and Europe originate mainly from higher plants and consist of type III (gasprone) kerogen dominated by vitrinite group maturation transforms peat to lignite, bituminous coal, and then anthracite coal.. Although oil is, at present, the principal source of energy in the world (easier