Where can you find the oldest rocks in Europe? Where can you see ancient hills around 800 million years old? How do you tell whether a valley was carved out by a glacier, not by a river? What are the Focoid Beds? Where do you find rocks folded like putty? How did the great masses of rock pile up like snow in front of a snow-plough? When did volcanoes spew lava and ash to form Skye, Mull and Rum? Where can you find fossils on Skye?