Rocks (Book)

This chapter discusses the rock cycle and each of the three major types of rocks that form on Earth. Separate sections cover igneous, sedimentary, and metamorphic rocks individually.

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- Igneous...

...Igneous rocks form when magma cools below Earth’s surface or lava cools at the surface (Figure).

 lava will harden into an igneous rock image

Lava is molten rock. This lava will harden into an igneous rock.