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Ocean Sediments

Sed entary = seated or resting A sed entary lifestyle = a lot of sitting around, not much exercise. Ocean Sediments. Sediment core samples from ocean floor. CLASSIFICATION OF MARINE SEDIMENTS based on Origin … know 4 70 % LITHOGENIC (carried by rivers & wind) Rocks Volcanogenic

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Ocean Sediments

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  1. Sedentary = seated or restingA sedentary lifestyle = a lot of sitting around, not much exercise

  2. Ocean Sediments

  3. Sediment core samples from ocean floor

  4. CLASSIFICATION OF MARINE SEDIMENTS based on Origin… know 4 70 % LITHOGENIC (carried by rivers & wind) Rocks Volcanogenic Cosmogenic 70% of ocean sediment volume 30% BIOGENIC (remains of ocean organisms) Teeth, bones, shells / “tests”, soft tissues Covers ½ of all continental shelves 30% of ocean sediment volume

  5. Thickest deposits … sediments delivered by rivers

  6. Wind (eolian) Sahara Dust (NASA)

  7. VOLCANOGENIC… from volcanos

  8. CLASSIFICATION OF MARINE SEDIMENTS based on Origin… know 4 70 % LITHOGENIC (carried by rivers & wind) Rocks Volcanogenic Cosmogenic 70% of ocean sediment volume 30% BIOGENIC (remains of ocean organisms) Teeth, bones, shells / “tests”, soft tissues ALGAL BLOOMS Covers ½ of all continental shelves 30% of ocean sediment volume

  9. Biogenic sediments Coccoliths Forams Diatoms Radiolarians

  10. Calcareous ooze components Coccoliths

  11. Calcareous ooze components Forams

  12. Part of the Silaceous ooze Diatom “tests”

  13. Silaceous ooze components Radiolarian tests

  14. Ocean Sediments Calcareous ooze

  15. Algal Bloom (algae) Patagonia coastline

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