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26 October, 01:28

An eruption is classified as an explosive volcanic eruption based on the amount of which mineral found in the magma?

A: silica

B: carbon

C: iron

D: basalt

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  1. 26 October, 03:50
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    The correct answer is A. silica.

    The amount of silica found in the magma determines the viscosity. The higher the silica in magma, the higher the viscosity of a magma. So the correct answer is silica. It is not among the other choices.
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