Obsidian lan Arkose Definition
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
arkose punika rock sedimentary, khusus jinis sandstone ngemot paling sethithik 25% Feldspar
panemu
obsius
Alexandre brongniart
Etimologi
saka obsidianus latin, misprint saka obsianus (lapis) (watu) saka obsius
saka wilayah Auvergne saka prancis digunakake dening geologist Alexandre brongniart french 1826 sing Applied istilah iki kanggo sawetara sandstones feldspathic
kelas
batuan beku
rocks sedimentary
sub-kelas
awet rock, medium atose rock
awet rock, hard rock
kategori liyane
rock opaque
rock grained coarse, rock opaque