Essay
How does silica content effect volcanic eruptions?
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Q121: Which mineral,quartz or feldspar,will crystallize first? Why?
Q122: Slate is metamorphosed<br>A)granite,a foliated rock with alternating
Q123: The two most common igneous rocks are
Q124: The last minerals to crystallize are those
Q125: A composite volcano is formed by<br>A)successive flows
Q127: Rocks altered by heat and pressure beneath
Q128: The process of crystallization enriches a magma
Q129: Regional metamorphic rocks are distinguished from igneous
Q130: Rocks break down to form sediment via<br>A)erosion.<br>B)transportation.<br>C)sedimentation.<br>D)weathering.
Q131: The most violent volcanic explosions are generally