definisi
obsidian punika kaca vulkanik alami kawangun minangka rock igneous extrusive. diprodhuksi nalika lahar felsic extruded saka gunung mbledhos ndingin kanthi cepet karo wutah kristal minimal
greenschist punika rock metamorphic sing dibentuk miturut Suhu paling lan tekanan lan biasane diprodhuksi dening metamorphism regional
Etimologi
saka obsidianus latin, misprint saka obsianus (lapis) (watu) saka obsius
saka mineral kayata chlorite, Serpentine, lan epidote, lan mineral platy kayata muscovite lan platy Serpentine kang ijo ing warna
kelas
batuan beku
rocks metamorphic
sub-kelas
awet rock, medium atose rock
awet rock, medium atose rock
group
vulkanik
ora ditrapake
kategori liyane
rock opaque
rock grained coarse, rock grained nggoleki, medium rock grained, rock opaque