Indiana Natural History

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Across
  1. 6. This kind of rock is formed when layers of material pile on top of each other
  2. 7. A piece of rock different in size or type than others in the area
  3. 8. This layer of sedimentary rock is the oldest
  4. 9. The origin of the glacier that once covered northern Indiana
  5. 10. Common Indiana rock formed from the shells of marine animals
  6. 11. Piles of rock pushed to together by glaciers to form hills
  7. 12. 500 million years ago North America was much farther _______ than today
Down
  1. 1. This era began two and a half million years ago and ended 11,700 years ago
  2. 2. The name of the last glacier to cover Indiana
  3. 3. 500 million years ago Indiana was covered by this
  4. 4. A depression or hole formed by retreating glaciers or floodwater
  5. 5. This substance results from the breakdown of marine animal shells