THE ROCK CYCLE
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FIGURE B.3 The large-scale geologic phenomenon known as the rock cycle involves several geologic processes that rework the materials of which rocks are composed to form and reform igneous, sedimentary, and metamorphic rocks.
(Addyvanich/Shutterstock) (Oleksandr Khalimonov/Shutterstock) (LesPalenik/Shutterstock) (U.S. Geological Survey)