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3c: MARINE ENVIRONMENTS

8. 9. 11. 3c: MARINE ENVIRONMENTS. Organic processes and organisms that modify sediments. Geographic location and plate tectonic setting. Transport agent and medium. Climate. Sedimentary environment. Sediments deposited. Continental margin/slope. Continental shelf. 10.

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3c: MARINE ENVIRONMENTS

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  1. 8 9 11 3c: MARINE ENVIRONMENTS Organic processes and organisms that modify sediments Geographic location and plate tectonic setting Transport agent and medium Climate Sedimentary environment Sediments deposited Continental margin/slope Continental shelf 10 Organic reef Turbidity currents Deep sea

  2. 9 8 11

  3. Marine Settings: #8-Deep Sea

  4. Marine Settings: #9-Continental Shelf (shallow)

  5. Marine Settings: #10-Organic Reef

  6. Carbonate platforms are built by reef-building organisms that precipitate calcium carbonate as calcite aragonite. Coral reef Lagoon Open ocean Light Light Light Carbonate platform

  7. Atoll formation: 1) Volcano, 2) reef forms, 3) volcano erodes

  8. 5 6 7 8 9 11 1 3 4 2 Quiz: MARINE ENVIRONMENTS 10

  9. How do Sedimentary Rocks form?

  10. Diagenesis Process...turns sediment into sedimentary rocks Requires: pressure, temperature, fluids Most cements are Calcium Carbonate or Silica

  11. Sedimentary Structures Features formed at time of deposition

  12. BEDDING: Horizontal layers of rock

  13. Cross-bedding: Ripples, dunes, sandbars

  14. Graded bedding

  15. Ripples

  16. Sedimentary Textures Clues to the history of the rock

  17. Grain size and angularity

  18. Degree of sorting

  19. Poorly sorted, coarse-grained Contact Well-sorted, fine-grained

  20. Siliciclastic classification is based on grain size Coarse: boulders and gravel Medium: sand Fine: silt, mud, clay

  21. Chemical Sedimentary Rocks

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