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Sedimentary Rock 10
Sedimentary Rock 10
Sedimentary Rock 10
Sedimentary Rock 10
Sedimentary Rock 10
Sedimentary Rock 10
Sedimentary Rock 10
Sedimentary Rock 10
Sedimentary Rock 10
Sedimentary Rock 10
Sedimentary Rock 10
Sedimentary Rock 10
Sedimentary Rock 10
Sedimentary Rock 10
Sedimentary Rock 10
Sedimentary Rock 10
Sedimentary Rock 10
Sedimentary Rock 10
Sedimentary Rock 10
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Sedimentary Rock 10

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Transcript

  • 1. Sedimentary RockStudents will be able toDescribe how rocks are formedClassify the sedimentary typesList uses for this rock type
  • 2. Changing Earth’s Surface
    Weathering
    Physical breaking of rock
    Mass Wasting
    Falling due to gravity
    Erosion
    Removal by mobile agents (water, wind, ice…)
  • 3. Weathering
    Frost Wedging
    Water expands 9% when frozen
    Repeated cycles will break apart rocks
  • 4. Weathering
    Unloading
    When pressure is released by exposure
    Rock cracks in sheets when it expands
  • 5. Weathering
    Biological
    Damage caused by roots and animals
  • 6. Weathering
    Chemical
    Acid rain, pollution, …
  • 7. Mass Wasting
    Spheroidal
  • 8. Erosion
    Loss of material
    usually loose soil
  • 9. Sedimentary Rock
    5% of Earth’s outer crust
    High Value
    Contains major energy resources
    Contains fossil record
  • 10. Formation
    Compaction
    Weight of material on top presses into rock
    Cementation
    Minerals enter spaces between to harden
  • 11. Types
    Clastic
    Rock fragments squeezed together
    Organic
    Formed from remains of living things
    Chemical
    Formed from chemical during evaporation
  • 12. Clastic
    Shale
    50% of all sedimentary rock
    Made from tiny pieces of clay
    Black due to abundant carbon (living)
    Formed in oxygen poor area (swamp)
    “prevents decay”
  • 13. Sandstone
    20% of all sedimentary rock
    Small grains (wind or river)
  • 14. Conglomerate
    Large particles
    Steep slopes or fast streams
  • 15. Organic
    Limestone
    10% of all sedimentary rock
    Mostly calcite
    Skeletons of coral reefs
    Accumulation of shells
    Caves from minerals above
  • 16. Coal
    Many plant parts
    Low oxygen formation (swamp)
    High heat and pressure to solidify
    Major source of US electrical energy
  • 17. Chemical
    Evaporites
    Seawater and salt flats evaporate
  • 18. Quiz
  • 19. Homework
    Describe how sedimentary rocks are made

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