celestecarnero9 celestecarnero9

18-02-2017
Social Studies

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Anthracite coal is so hard and pure it is also referred to as a _____.

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setonmom1 setonmom1

18-02-2017

Anthracite coal is considered a metamorphic rock because the original rock was subject to high heat and pressure which causes the rock to change

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1 2/5m - 3/5(2/3m+1)