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Sedimentary Rocks

Earth Science - Middle School

Sedimentary Rocks © Copyright NewPath Learning. All Rights Reserved. 94-4673 Visit for Online Learning Resources. Classifying Sedimentary Rocks Sedimentary rocks form in layers, or strata, that have been deposited and cemented together over millions of years. There are three categories of sedimentary rock—clastic, organic and chemical. Clastic sedimentary rocks are made of pieces of pre-existing rocks that are transported by wind and water and deposited in a new location. Layers of sediment accumulate and become cemented together to form solid rock. Sandstone, shale and conglomerate are examples of clastic sedimentary rocks. erosion pressure deposition compaction cementation shale sandstone conglomerate fossilized limestone coquina (limestone) Organic sedimentary rocks form when shell remains fossilize and become a layer of limestone on the ocean floor. A coral reef is an example of organic limestone formed from the buildup of coral skeletons. Chemical sedimentary rocks form through precipitation or crystallization of dissolved minerals. Dissolved calcite forms fine- grained limestone that shows no fossilized remains. Limestone is primarily used for concrete and road construction. Coal is a type of organic sedimentary rock that is used as a solid fuel to produce electricity and heat. coal limestone
Pause and Review Compare and contrast the three types of sedimentary rock. Sedimentary Rocks SEDIMENTARY ROCKS clastic chemical organic CategoryOrigin & Description Example © Copyright NewPath Learning. All Rights Reserved. 94-4673 Visit for Online Learning Resources.
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