1 Definition
1.1 definisi
sandstone wis ditetepake minangka rock kang dumadi saka pari-parian wedhi-ukuran saka macem-macem mineral biasane ukuran seragam lan asring Gamelan lan dibunderaké
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
1.2 Sajarah
1.2.1 asal
1.2.2 panemu
1.3 Etimologi
saka komposisi, wedhi lan watu
saka obsidianus latin, misprint saka obsianus (lapis) (watu) saka obsius
1.4 kelas
rocks sedimentary
batuan beku
1.4.1 sub-kelas
awet rock, hard rock
awet rock, medium atose rock
1.5 kulawarga
1.5.1 group
1.6 kategori liyane
rock grained coarse, rock grained nggoleki, rock opaque
rock opaque