Ocean Floor Spreading

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Ocean Floor Spreading

  1. 1. OCEAN FLOOR-SPREADING
  2. 2. WEBSITES FOR INFORMATION <ul><li>&quot;Seafloor Spreading.&quot; Wikipedia. May/24/2009. 11 Jun 2009 <http://en.wikipedia.org/wiki/Seafloor_spreading>. </li></ul><ul><li>Seafloor Spreading.&quot; pmel.noaa. 11 Jun 2009 <http://www.pmel.noaa.gov/vents/nemo/explorer/concepts/spreading.html>. </li></ul>
  3. 3. OCEAN FLOOR- SPREADING <ul><li>ALSO CALLED SEAFLOOR SPREADING </li></ul><ul><li>DEFINITION- THE PROCESS IN WHICH THE OCEAN FLOOR IS EXTENDED WHEN TWO PLATES MOVE APART. </li></ul>
  4. 4. MORE INFORMATION <ul><li>AFTER PROCESS, A NEW CRUST IS FORMED. </li></ul><ul><li>AS THE PLATES MOVE APART, ROCKS BREAK AND FORM A CRACK. </li></ul><ul><li>WHEN MAGMA PILES UP ON THE CRACK, IT FORMS A LARGE SPAN OF MOUNTAINS. </li></ul>
  5. 5. PLATE TECTONICS <ul><li>. CRUST- BROKEN UP SURFACE THAT FLOATS ON THE MANTLE </li></ul><ul><li>. MOUNTAINS ARE MADE WHEN PLATES RUN INTO EACH OTHER SO THEY HAVE NO WHERE ELSE TO GO BUT UP. </li></ul><ul><li>. THREE TYPES OF PLATE-PLATE INTERACTIONS…. </li></ul><ul><li>1. CONVERGENT- WHERE PLATES COLLIDE </li></ul><ul><li>2. DIVERGENT- WHERE PLATES SEPARATE </li></ul><ul><li>3. TRANSFORM MOTION- WHERE PLATES PASS BY EACH OTHER. </li></ul>
  6. 6. PLATE TECTONICS cont. <ul><li>SEAFLOOR SPREADING IS THE USUAL PROCESS AT WORK AT DIVERGENT PLATE BOUNDARIES. </li></ul><ul><li>AS TWO DIFFERENT PLATES SEPARATE, MOLTEN ROCKS FILL UP THE CRACK </li></ul>

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