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Unit 4 Part 2 Cementation the gluing together of rock particles to form sedimentary rock Compaction closely packed together Fossil fuels coal, oil and natural gas are nonrenewable resources that are formed from the decayed remains of ancient animals and plants and take millions of years to form Coal a solid fossil fuel that is created by the building-up of plant and animal remains over time in bogs or marshes (swamps), and landfills Natural gas a fossil fuel that is created by the building-up of plant and animal remains that layer upon each other over a long period of time in the bottom of the ocean Oil a liquid fossil fuel that is used as a source of energy for homes and vehicles Sedimentary rocks rocks that are formed from sediments that have been pressed and cemented together into layers