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Sedimentary Rocks

Sedimentary Rocks. Made from sediments or rock material that has been broken down in some way. Sedimentary rocks are usually formed in a watery environment. Often layered Are the only rocks that contain fossils. Types of Sedimentary Rocks.

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Sedimentary Rocks

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  1. Sedimentary Rocks

  2. Made from sediments or rock material that has been broken down in some way. • Sedimentary rocks are usually formed in a watery environment. • Often layered • Are the only rocks that contain fossils

  3. Types of Sedimentary Rocks • Clastic (fragmental) –made by compaction and cementation of sediments. • Clastic rocks are identified by the size of the fragments.

  4. Mixed

  5. Conglomerate has rounded fragments

  6. Breccia has angular fragments

  7. Chemically formed rocks: evaporites • Formed when water carrying minerals evaporates and leaves the minerals behind. • Are identified by the minerals present (ie halite hardness of 2.5)

  8. Bioclastic- • bio= life • clastic= fragments • Made from accumulated shells (limestone) or plants (coal)

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