The animal's Bones left on the seafloor., The animal dies and sinks to the bottom of the sea., An animal is alive and swimming in a sea., The soft parts of the animal rot away., The animal becomes a fossil., Over a very long time, more and more mud is piled over the animal., The skeleton of the animal is buried in the mud on the seafloor., The fossil is discovered., Over a very long time, the animal's bones are slowly replaced with stone..

Fossil Sequence - Labelled Diagram Third Grade

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