Magma in the asthenosphere is primarily granite in composition because the magma is high in silica in the athenosphere.

Name: Magma in the asthenosphere is primarily granite in composition because the magma is high in silica in the athenosphere.
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Magma in the asthenosphere is primarily basaltic in composition, which is low in silica. Granite is formed from magma with higher levels of silica, but this typically forms in the continental crust, not the asthenosphere.

Magma in the Asthenosphere Is Primarily Granite in Composition Because