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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SEDIMENTARY ROCKS

Lesson Summary

  • 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.