Rocks are classified according to characteristics such as mineral and chemical composition, permeability, texture of the constituent particles, and particle size. ... This transformation produces three general classes of rock: igneous, sedimentary and metamorphic.
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Rocks are classified according to characteristics such as mineral and chemical composition, permeability, texture of the constituent particles, and particle size. ... This transformation produces three general classes of rock: igneous, sedimentary and metamorphic.