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Sea Floor

Sea Floor. Part 3. Underwater volcanic eruption! COOL. http:// www.youtube.com/watch?v = hmMlspNoZMs. Trenches . Sediments. Thicker the farther away from the ridge. Two types Lithogenous Biogenous Composed of CaCO3 or SiO2. Diatoms. Radiolarians. Foraminiferans. Coccolithophorids.

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Sea Floor

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  1. Sea Floor Part 3

  2. Underwater volcanic eruption! COOL • http://www.youtube.com/watch?v=hmMlspNoZMs

  3. Trenches

  4. Sediments • Thicker the farther away from the ridge. • Two types • Lithogenous • Biogenous • Composed of CaCO3 or SiO2

  5. Diatoms

  6. Radiolarians

  7. Foraminiferans

  8. Coccolithophorids

  9. Microfossils • The organisms that produce biogenous sediments are microscopic or close to it. • Sediment particles are sometimes called microfossils. • Can determine past climate • Carbon dating • Ratios of magnesium to calcium, isotopes of oxygen

  10. Continental Margins • Continental Shelf • Continental Slope • Continental Rise • Abyssal Plain • Draw a diagram and label each margin – take notes on your diagram about its characteristics

  11. Passive and Active Margins

  12. Active vs. Passive Margins • Active • Passive

  13. Deep Ocean Basins • The abyssal plain • Rises at a gentle slope towards the mid ocean ridge system. • Flat with some channels, low abyssal hills, plateaus and rises • Seamounts • Mariana Trench- 36,163 ft deep

  14. Hydrothermal Vents • Central rift valley • Black smokers • Life discovered around the hydrothermal vents • http://www.youtube.com/watch?v=rFHtVRKoaUM

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