Rock Cycle Powerpoint

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Rock Cycle Powerpoint Powered By Docstoc
					Megan Robson, Katy Weaver,
      Steven Marriott
         Period 1
           Sedimentary Rock
• ¾ of rocks in the
  lithosphere
• Three types
  – Clastic
  – Organic
  – Chemical
• Heat and pressure
  exerted on these
  rocks forms
  metamorphic rocks
    Clastic Sedimentary Rocks
• Mud, sand , gravel
  and clay
• Made of clasts, which
  are particles of other
  rocks
• Sediments that clump
  into rocks
Organic Sedimentary Rocks
             • Forms in the sea as
               microscopic
               organisms
             • Formed by dead
               plankton
             • Limestone and chert
               are created
             • Dead plant material to
               peat to coal
Chemical Sedimentary Rocks
             • Isolated sea water
               that evaporates
             • Some minerals
               precipitate
             • Called evaporite
               sequence
             • Rocks are left over
                Sediments
• Small pieces of other
  rocks
• Comes from erosion
  and weathering of
  igneous,
  metamorphic, and
  sedimentary rocks
• Come together to
  form sedimentary
  rocks
            Igneous Rock
• 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
Magma
  • Under the Earth’s
    crust
  • Cools to form igneous
    rocks
  • Melted igneous and
    metamorphic rocks
         Metamorphic Rock
• Found in the
  lithosphere
• Heat and pressure
  exerted on
  sedimentary and
  igneous
  rocks=metamorphic
  rocks
             Bibliography
• http://www.windows.ucar.edu/tour/link=/ea
  rth/geology/sed_intro.html
• http://geology.about.com/cs/basics_roxmin
  /a/aa011804b.htm

				
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