Geologists estimate that ________ percent of the Earth's crust is composed of silicates.

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Geologists estimate that about 90 percent of the Earth's crust is composed of silicates. This is because silicates are the most common type of mineral in the Earth's crust, and they make up the bulk of the rocks that form the crust. Other minerals, such as carbonates and sulfates, are also present but in much smaller quantities.

Geologists Estimate That ________ Percent of the Earth's Crust Is