Wangun coal saka klempakan saka lebu tetanduran ing lingkungan rawa kang wis kakubur sedimen kayata lendhut utawa wedhi lan banjur compacted kanggo mbentuk coal.
carbonatites sing intrusive utawa extrusive batuan beku kang ditetepake dening komposisi mineralogic dumadi saka mineral karbonat luwih saka 50 persen lan sing kawangun amarga derajat kurang saka leleh sebagean saka rocks.
analcime, apatite, barite, kalsit, chalcopyrite, chlorite, chromite, clausthalite, mineral lempung, grup crandallite, dolomite, Feldspar, galena, gypsum, marcasite, muscovite utawa illite, pyrite, quartz, siderite, sphalerite, zirkon
ancylite, apatite, barite, fluorit, magnetite, natrolite, sodalite
karbon, hidrogen, nitrogen, oksigen, belerang
cao, karbon dioksida, sodium oxide
metamorphism kakubur, metamorphism cataclastic, metamorphism regional
metamorphism kakubur, kontak metamorphism