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arrowheads
''Schist'' is a metamorphic rock, characterized by its tendency to break easily into sheets due to the high mica content of the rock. It usually forms from [[slate]].
''Schist'' is a metamorphic rock, characterized by its tendency to break easily into sheets due to the high mica content of the rock. It usually forms from [[slate]]. Since ancient times, schists have been used for arrowheads, and other cutting implements.
[[category:Metamorphic rocks]]
[[category:Metamorphic rocks]]