Movement on them is thought to have taken place in the Tertiary period.

Mammals really got going during the early Tertiary period, about 66 to 57 million years ago.

Further volcanic activity took place during the Tertiary period, some 65 million years ago.

Europe's present shape dates to the late Tertiary period about five million years ago.

The territory is made up of land belonging to the Tertiary period.

In the Tertiary period the area was covered by thick forests.

The oldest dates from the early Tertiary period, over 50 million years ago.

The Tertiary period was a time of rising and falling local temperatures.

They differ widely in age but were probably formed during the Tertiary period.

During the early part of the Tertiary period climates were much warmer than they are today.