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.
- Most sedimentary rocks form from sediments. These sediments are deposited, forming layers.
- The youngest layers are found on top, with older layers below.
- Sediments must be compacted and cemented to make sedimentary rock.
- Chemical sedimentary rocks are made of precipitated minerals.