Silicic
Igneous rocks are classified by geologists using various schemes. One of the several schemes based on chemical composition divides igneous rocks into four categories according to silica (silic...
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Silicates
Silicates are compounds of silicon, oxygen and other elements. Silica (silicon dioxide), silicate, and aluminosilicate minerals make up over 90% of the Earth's crust. Naturally occurring sil...
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Silicic
Silicates