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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TYPE OF ROCKS

Three Main Categories of Rocks

Geologists group rocks based on how they were formed. The three main kinds of rocks are:

Igneous

Sedimentary

Metamorphic

Rocks can be changed from one type to another, and the rock cycle describes how this happens.