Cards (6)

    • layers in the ocean crust
      A) sediments
      B) basaltic lavas
      C) basaltic dykes
      D) gabbro
      E) peridotite
    • Lizard peninsula is an ophiolite. 
    • Profiles of the earths crust can be determined by ophiolite suites. 
    • All ocean crust is assumed to have this structure, because all ocean crust is formed from mid ocean ridges. 
    • Layered seismic velocity is very similar in all ocean basins. 
    • Along some slower spreading MOR altered peridotites are found by researches dredging the sea floor. 
      Serpentine is peridotite with olivine that has reacted with ocean water. 
       
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