Kinds Of Minerals And Rocks

Kinds Of Minerals And Rocks

Apr 27, 2020018332Dark-colored rocks are more basic and have a higher percentage of ferromagnesian minerals. Igneous rocks are broken up into three main groups acid, intermediate, and basic. Acid rocks have over 65 silica, intermediate rocks have 55-65 silica, and basic rocks have 45-55 silica. Igneous rock forms when magma molten rock cools and solidifies.

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