Fossil Clues Beneath the Soccer Field

Two Sites, One New Field

Workers are preparing a new school soccer field. They uncover natural rock at two places: Site A near the west goal and Site B near the east goal. Scientists photograph fossils still fixed in the rock, not in loose gravel brought from somewhere else. Students study the photographs safely in their classroom. Today, the field is dry land with grass. Neither site is covered by a sea.

Fossils are remains or signs of living things from long ago. At Site A, scientists find shell fossils with curved ridges and coral fossils with branching shapes. At Site B, they find leaf prints with many small leaflets and fossil stumps with roots spreading beneath them. The scientists identify these stumps as standing where the plants grew.

The class uses a guide to compare the fossils with living things today. The matching sea clams are animals that live in salt water. The matching branching corals are animals that live in shallow salt water. The matching leafy plants and rooted trees grow on land. Similar shapes can help scientists investigate past living things and their surroundings.

Scientists count fossil finds in one equally sized patch of rock at each site. A find may be just part of a living thing. The graphs show their records. These small patches do not preserve everything that once lived nearby, and the report gives no ages for the rocks.