tatanan
Wangun coal saka klempakan saka lebu tetanduran ing lingkungan rawa kang wis kakubur sedimen kayata lendhut utawa wedhi lan banjur compacted kanggo mbentuk coal.
claystone iku umume cukup alus, nanging bisa dadi hard lan brittle. iku formulir amarga cuaca saka mudstone.
isi Mineral
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
biotite, chlorite, Feldspar, micas, muscovite utawa illite, plagioclase, pyrite, quartz
senyawa isi
karbon, hidrogen, nitrogen, oksigen, belerang
aluminium oxide, ca, NaCl, cao, wesi (iii) oxide, MgO, silikon dioksida