Sedimentary Rock

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Sedimentary rocks are composed of small bits of rocks (mud, sand, gravel), and sometimes plants and/or animals, that have become 'cemented' together in layers over time.

Composed of bonded grains of eroded rocks. Many break in plate-like fragments.


  • Kavanaugh, James. Pocket Naturalist - Geology - An Introduction to familiar Rocks, Minerals, Gemstones & Fossils, Waterford Press: Arizona (2000)