acid rock

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An igneous rock that contains more than 60% silica by weight, most of which is as silicate materials, with the excess of about 10% as free quartz. Acid rock is low in magnesium. Acid rocks tend to be much lighter in colour than basic rocks, they tend to disintegrate around the mineral crystals, and they often weather into coarse‐textured and rather infertile soils.

Subjects: Environmental Science.

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