On their first trip to the river, he had explained that fossils are the
remains of plants and animals that lived many, many years ago.

Over the years the plants and animals had been covered by layers of sand and mud and had gradually turned to stone.

In the recent past, the force of the river had worn through these layers of stone to expose fossils from an 80 million year old ocean floor.

Each trip they made to the river was a journey back in time.

Some of the fossils they had found were ammonites, lobsters, sharks� teeth and shells.�

They were the remains of animals that lived in the ocean at the same time dinosaurs had lived on land.

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