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
foidolite jinis langka coarse-grained rock igneous intrusive karo isi Mineral feldspathoid luwih saka 60%
Sajarah
asal
Ethiopia
-
panemu
obsius
Ora dingerteni
Etimologi
saka obsidianus latin, misprint saka obsianus (lapis) (watu) saka obsius
saka feldspathoid Mineral kang isi utama rock
kelas
batuan beku
batuan beku
sub-kelas
awet rock, medium atose rock
awet rock, rock alus
kulawarga
group
vulkanik
plutonic
kategori liyane
rock opaque
rock grained coarse, rock grained nggoleki, medium rock grained, rock opaque