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Types of Rocks and the Rock Cycle

Learn about the different types of rocks - sedimentary, igneous, and metamorphic - and how they are formed through the rock cycle. Discover the processes of weathering, erosion, and heat and pressure that shape these rocks.

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Types of Rocks and the Rock Cycle

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  1. Rock Cycle Megan Robson, Katy Weaver, Steven Marriott Period 1

  2. Sedimentary Rock • ¾ of rocks in the lithosphere • Three types • Clastic • Organic • Chemical • Heat and pressure exerted on these rocks forms metamorphic rocks

  3. Mud, sand , gravel and clay Made of clasts, which are particles of other rocks Sediments that clump into rocks Clastic Sedimentary Rocks

  4. Forms in the sea as microscopic organisms Formed by dead plankton Limestone and chert are created Dead plant material to peat to coal Organic Sedimentary Rocks

  5. Isolated sea water that evaporates Some minerals precipitate Called evaporite sequence Rocks are left over Chemical Sedimentary Rocks

  6. Small pieces of other rocks Comes from erosion and weathering of igneous, metamorphic, and sedimentary rocks Come together to form sedimentary rocks Sediments

  7. Over 2/3 of the Earth’s surface Made from Magma under the Earth’s crust Basalt is the most common igneous rock All rocks started as igneous rocks In the lithosphere Igneous Rock

  8. Under the Earth’s crust Cools to form igneous rocks Melted igneous and metamorphic rocks Magma

  9. Found in the lithosphere Heat and pressure exerted on sedimentary and igneous rocks=metamorphic rocks Metamorphic Rock

  10. Bibliography • http://www.windows.ucar.edu/tour/link=/earth/geology/sed_intro.html • http://geology.about.com/cs/basics_roxmin/a/aa011804b.htm

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