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Earth's System: Earth’s Materials
Igneous Rock Classification - III
Description
Igneous Rock Classification - III
As magma contains less silica, it begins to form darker, denser, and heavier igneous rocks. Whether magma cools at Earth’s surface or deep underground determines the texture and appearance of the rocks formed. Magma with intermediate amounts of silica produces r...
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Transcript
Magma with less silica than felsic magma creates darker, denser, and heavier igneous rocks.
Depending on whether the magma cools at the surface or deep underground, it forms different types of rocks.
For example, intermediate magma, which has a silica content more than mafic and ultramafic magma, around 52–63%, forms andesite...
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