Illustrated by · PDF file · 2017-07-18basalt scoria light greg andesite andesite...
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WWW.SCIENCEFRIDAY.COM/EDUCATE Illustrated by Ariel Davis
Illustrated by · PDF file · 2017-07-18basalt scoria light greg andesite andesite basalt COARSE-GRAINED rock has crystals visible to the naked ege dark-colored fresh rock ... Microsoft