The density of rocks is generally related to composition; rocks with higher silica contents tend to be less dense. Which of the following places rock compositions in order of increasing density?

Question

Biology

Rosa Sloan

27 February, 23:24

The density of rocks is generally related to composition; rocks with higher silica contents tend to be less dense. Which of the following places rock compositions in order of increasing density?

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Answers (1)

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Keshawn Martin · Answer 1

Felsic, intermediate, mafic, and ultramafic.

Explanation:

If we classify igneous rocks according to their silica composition the ones that have more than 65% of silica in their composition are called felsic; following the felsic rocks we have the intermediate rocks, these have between 55% and 65% of silica in their composition; the rocks that have between 55% and 45% of silica are called mafic and last but not least, we have the ultramafic ones that have less than 45% of silica in them.

If we think about their density, we know that when there is more silica the rock is less dense, so the classification from decreasing to increasing density is Felsic, intermediate, mafic, and ultramafic.