trachyandesite punika, hard rock nggoleki-grained kang jinis metasomatite, ateges ngrubah basalt. iku formulir karo utawa tanpa crystallization, salah siji ngisor permukaan minangka rocks intrusive utawa ing lumahing minangka rocks extrusive.
Feldspar alkali, biotite, olivine, plagioclase, pyroxene, sodic plagioclase
aluminium oxide, cao, wesi (iii) oxide, feo, kalium oxide, MgO, keda, sodium oxide, fosfor pentoxide, silikon dioksida, titanium dioxide
metamorphism cataclastic, kontak metamorphism, metamorphism regional
udan biologi, udan kimia, udan mechanical
erosi kimia, erosi gisik, banyu erosi, angin erosi