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What do you think this came from?
So far, Doug has found fossil seashells and a fossil shark tooth. What other fossils do you think Doug would find in the quarry?
Do you think habitats have changed in other parts of the world besides Illinois? How could you find out?
This website from the Kentucky Geological Survey includes several hands-on activities that demonstrate how different types of fossils form. It includes a variation on the classic plaster and mold activity using white glue instead.