Fossil tree trunks and other plant fossils are often found in the rocks above coal beds.

They also collected rock samples, penguin eggs and plant fossils.

Between 1902 and 1908, hundreds of sources for Cretaceous plant fossils were discovered.

The dense vegetation of these swamps left behind many plant fossils.

The area also features petrified trees and plant fossils, revealing in stone a picture of life long ago.

The question of the earliest plant fossils depends on what is meant by the word "plant".

These plant fossils are now known to prove the theory of continental drift.

A plant fossil is any preserved part of a plant that has long since died.

These are the most commonly found type of plant fossil.

Few plant fossils are known in New Jersey from this time.