ganisters sing kawangun dening karusakan saka mineral gampang weathered utamané Feldspar, ing cakrawala lumahing lemah dening pangolahan lemah pambentuk.
basaltic trachandesite punika, hard rock nggoleki-grained sing formulir nalika bit lahar njupuk metu saka gunung.
kalsit, lempung, mineral lempung, Feldspar, micas, quartz
olivine, plagioclase, pyroxene
aluminium oxide, cao, wesi (iii) oxide, kalium oxide, MgO, sodium oxide, silikon dioksida
aluminium oxide, cao, wesi (iii) oxide, feo, kalium oxide, MgO, keda, sodium oxide, fosfor pentoxide, silikon dioksida, titanium dioxide