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5. Ocean Geography Notes
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5. Ocean Geography Notes

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  • 1. Ocean Geography 1. Earth’s Interior
  • 2. Interior of the Earth:
    • Three main levels:
      • Crust
      • Mantle
      • Core
    • Volume Distribution:
      • Core – 15%
      • Mantle – 85%
      • Crust - >1%
  • 3.  
  • 4.  
  • 5.  
  • 6. Crust
    • Since it is the only accessible layer, we know the most about it.
    • Consists of layered rocks located on 12 plates
    • The MOHO separates the crust from the mantle
    • Crust slides around on liquid mantle
    • 5 km to 70 km in depth
  • 7. Plates
  • 8. How the Plates Move:
  • 9. Sea Floor Spreading:
    • Two types of crust, Continental & Oceanic
    • Oceanic crust is constantly being reformed
    • When it meets the continental crust it subducts into the mantle because it is more dense
  • 10.  
  • 11. Mantle:
    • Heat from the core drives the convection in the mantle which in turn drives plate tectonics
    • Makes up the majority of the Earth’s volume
    • Solid, though ductile enough it flows on a long enough period of time
  • 12.  
  • 13. Core
    • Liquid outer core
    • Solid inner core
    • Much is speculated about its composition
  • 14. Ocean Geography 2. Ocean Floor Features
  • 15.  
  • 16.  
  • 17. Ocean Floor Features
    • Continental Shelf – Shallow, sloping region that extends beyond the continent
    • Continental Slope – Steep drop off located at the end of the continental shelf
  • 18. Ocean Floor Features
    • Abyss – deeper regions of the ocean
    • Abyssal Plain – nearly flat, smooth region of the ocean floor
  • 19. Ocean Floor Features:
    • Mid Ocean Ridge – Mountain range in the ocean created usually by diverging or converging plates
    • Trench – deep steep side Canyons
  • 20. Ocean Geography: 3. Land & Water Features
  • 21. Bay
    • A body of water surrounded on three sides by land
  • 22. Strait/Sound
    • Water passage that connects two bodies of water or water ways
  • 23. Delta
    • A landform created from the deposits of a river as it enters a sea or ocean
  • 24. Sea
    • Usually a large body of salty water connected to an ocean
  • 25. Cape
    • A long pointed piece of land that sticks out into an ocean, lake, or sea
  • 26. Peninsula
    • A piece of land surrounded on three sides by water
  • 27. Lake
    • Body of water surrounded on all sides by land, very large ones are sometimes called seas
  • 28. Fjord
    • Long narrow sea inlet border on the sides by steep cliffs

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