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
kenyte iku macem-macem phonolite porphyritic utawa trachyte rock karo phenocrysts rhomb shaped anorthoclase karo rupo olivine lan augite ing matrik glassy
Sajarah
asal
Ethiopia
gunung kenya
panemu
obsius
JW Gregory
Etimologi
saka obsidianus latin, misprint saka obsianus (lapis) (watu) saka obsius
saka gunung ranges- Gunung kenya lan dijenengi dening JW Gregory in 1900
kelas
batuan beku
batuan beku
sub-kelas
awet rock, medium atose rock
awet rock, medium atose rock
kulawarga
group
vulkanik
-
kategori liyane
rock opaque
rock grained nggoleki, rock opaque