Secondary Era

Secondary Era
from 250 million to 65 million years ago
(or Mesozoic)

The movements of magma inside the Earth cause the division of Pangaea.

LAURASIA
to the north

GONDWANA
to the south

The climate becomes less humid.

Life forms adapt to the new changes.

250 million years ago
A great abundance of plants creates the ideal environment for large herbivores.

230 million years ago
Dinosaurs appear.

130 million years ago
Flowering plants appear.

66 million years ago
Dinosaurs become extinct.

65 million years ago
The first small mammals appear.

PRIMARY – SECONDARY – TERTIARY