Príncipe is the oldest of the islands, with the oldest rocks dating back 31 million years.

The map shows the Martin Formation which shows rocks dating 1.63 billion years ago.

They found the crater structure in rocks dating to the Cretaceous and Jurassic periods.

Seeds of Acer are rare compared with the leaves, which can be found in rocks dating back to the Cretaceous period.

Ganopristis is a prehistoric genus of saw fish whose fossils are found in rocks dating from the Maastrichtian stage.

Fossil caddisfly have been found in rocks dating back to the Triassic.

The entire stratigraphic section included rocks dating from the Cretaceous to Pennsylvanian.

Ancient examples have been found in rocks dating back to the Neoproterozoic.

Not far from it there are some tombs cut into the rock dating from about the 4th century.

It has sedimentary rock dating back to the Permian period that is protected by its Special Area status.