Obsidian lan Greywacke 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
greywacke wis ditetepake minangka rock sandstone coarse-grained peteng kang ngandhut sen lempung luwih saka 15 saben
Etimologi
saka obsidianus latin, misprint saka obsianus (lapis) (watu) saka obsius
saka grauwacke german, saka grau grey + wacke
kelas
batuan beku
rocks sedimentary
sub-kelas
awet rock, medium atose rock
awet rock, hard rock
group
vulkanik
ora ditrapake
kategori liyane
rock opaque
rock grained nggoleki, rock opaque