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Obsidian
Obsidian

Taconite
Taconite



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Taconite

Obsidian lan Taconite Definition

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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
Ethiopia
obsius
saka obsidianus latin, misprint saka obsianus (lapis) (watu) saka obsius
batuan beku
awet rock, medium atose rock
vulkanik
rock opaque
 
taconite punika biji wesi kurang-bahan kang belongs kanggo sedimen rock lan ngemot bab 27% wesi lan 51% silika
western australia, Minnesota
Newton Horace Winchell
saka jeneng gunung taconic ing england anyar
rocks sedimentary
awet rock, medium atose rock
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rock grained coarse, rock opaque