Obsidian lan Anthracite 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
Anthracite jinis rock sedimentary kang hard lan macem-macem batu bara sing wis luster dhuwur
asal
Ethiopia
pennsylvania, kita
panemu
obsius
Ora dingerteni
Etimologi
saka obsidianus latin, misprint saka obsianus (lapis) (watu) saka obsius
saka anthrakites greek, saka anthrax, anthrak meaning coal
kelas
batuan beku
rocks metamorphic
sub-kelas
awet rock, medium atose rock
awet rock, rock alus
kategori liyane
rock opaque
rock grained coarse, rock grained nggoleki, medium rock grained, rock opaque