nalika lahar dirilis saka gunung, iku diwiwiti saka cooling cepet banget kang freezes mekanisme saka crystallization. asil punika kaca vulkanik karo susunan Gamelan seragam.
aluminium oxide, cao, wesi (iii) oxide, feo, kalium oxide, MgO, keda, sodium oxide, fosfor pentoxide, silikon dioksida, titanium dioxide
metamorphism kakubur, metamorphism cataclastic, kontak metamorphism
udan biologi, udan kimia, udan mechanical
erosi kimia, erosi gisik, erosi Glacier