Obsidian lan Gritstone Definition

Obsidian

Gritstone

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1 Definition

1.1 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

gritstone utawa grit punika hard, coarse-grained, siliceous sandstone

1.2 Sajarah

1.2.1 asal

Ethiopia

pennines, england

1.2.2 panemu

obsius

JJ Ferber

1.3 Etimologi

saka obsidianus latin, misprint saka obsianus (lapis) (watu) saka obsius

saka grit + watu

1.4 kelas

batuan beku

rocks sedimentary

1.4.1 sub-kelas

awet rock, medium atose rock

awet rock, hard rock

1.5 kulawarga

1.5.1 group

vulkanik

ora ditrapake

1.6 kategori liyane

rock opaque

rock grained coarse, rock opaque

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