The rocks in Northumberland and the Borders are ancient. They are as rich in interest as those of the Dorset coast but much older and speak of a time when amphibians and giant insects were the height of evolution. By looking at the cycles of rock on the coast we can build a picture of seas filled with corals, sea lilies and brachiopods and vast deltas including swamps crowded with giant tree ferns. Come and join one of Ian's regular walks and start exploring this ancient world.