How Has Life Changed over Geologic Time?
ES3002  Fossils Indicate Environment

The relative position of fossils within layers of rock provides a record of the geologic events occurring at a place. For instance, when marine fossils are found at a site, it means that at one time seas covered the land.

Paleontological Research Institution
Fossilized scallop with barnacles found in Yorktown, Virginia.
Carla McAuliffe
Waves crashing against rocks at a beach.

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