Edible Geology
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  • Could try to cut the jello into 20 pieces, one for each child. If it’s not enough, cut 10 and split children into girl/girl, boy/boy pairs. Then have boys try uplifting and girls try overthrust. Save one piece for teacher to try erosion with a blow dryer.


  • 1. Edible Geology -directions
  • 2. Limestone
    • First layer is limestone
    • Formed when land was under water
  • 3. Sandstone
    • Formed by sand deposited by a river
    • Fossils are often found here
  • 4. COAL
    • Formed when area was part of a large swamp
    • Very important to fossil hunters
    • Where you find coal, you are likely to find fossils nearby
    • Dark coal beds are easy to spot
  • 5. COAL
  • 6. Sandstone - 2
  • 7. Siltstone
    • Made of grains that are smaller than sand, but larger than clay
  • 8. Final Formation
    • Which layer is the “oldest”?
    • Where are the fossils?
    • Will they ever be found?
    • Rock layers can stretch, bend, and even break
  • 9. Uplifting
    • Pressures inside the earth form mountain ranges
    • Can twist rock layers
    • Slide a knife under the center of your gelatin square and lift.
    • Bend…and break
  • 10. Overthrust
    • Rock layers (strata) can get mixed up another way
    • Gently push in from opposite sides of the square so the center rises up.
    • Mixed up strata
    • makes it hard to
    • determine where
    • youngest strata is
  • 11. Faulting
    • Earth’s surface has big cracks called faults
    • Sometimes land around a fault line is raised above another
    • Don’t waste your
    • jello…just look here:
  • 12. Finally…Erosion
    • Rocks are constantly being worn away by wind and rain, uncovering fossils
    • Ahhhh!