The Coalifiion Process | SpringerLink
WEBAbstract. The transformation of vegetable matter into peat and coal is commonly regarded as proceeding in two steps, called the biochemical and physicochemical stage of coalifiion (Stach et al. 1982), respectively. Other terms, such as "first and second phase" (Mackowsky 1953), or "diagenetic and metamorphic stage" (Teichmüller 1962 ...