Obsidian lan Lignite 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
lignite punika coal brownish alus kang nuduhake ngambah tetanduran lan ing antarané coal bituminous lan peat
Etimologi
saka obsidianus latin, misprint saka obsianus (lapis) (watu) saka obsius
saka french, kayu lignum latin + -ite1
kelas
batuan beku
rocks sedimentary
sub-kelas
awet rock, medium atose rock
awet rock, rock alus
group
vulkanik
ora ditrapake
kategori liyane
rock opaque
rock grained coarse, rock grained nggoleki, medium rock grained, rock opaque