Sedimentary Rocks & Fossils

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Across
  1. 3. A rock composed of pebbles, or clasts, cemented in a matrix
  2. 7. A type of bivalved mollusc that sometimes burrows into the seafloor (ex: clams)
  3. 9. A sessile marine organism that has bilateral symmetry (looks like a clam seashell); very common in Ohio
  4. 12. An extinct marine animal with a segmented body; Ohio's state fossil!
  5. 14. May be regular or irregular (ex: sand dollars)
  6. 15. A rock formed from sand grains, mostly quartz or feldspar
Down
  1. 1. A carnivorous jawed fish whose best fossils were found in the Cleveland Shale
  2. 2. A mollusc that moves by sliding and has a coiled shell (ex: snails)
  3. 4. Modern corals that make up today's reefs
  4. 5. Has both a rock and mineral form; is industrially used to make drywall
  5. 6. A rock made of microscopic quartz that was used to make ancient tools
  6. 8. An organism that attaches to the seafloor with a stalk and has five-sided symmetry, also called sea lillies
  7. 9. An organism with a thin stalk and short arms, also called sea buds
  8. 10. A rugose coral that grows in a cone shape
  9. 11. A rock mostly made from calcite and often contains fossils
  10. 13. A rock formed when mud and clay get compacted over time