The Triassic, Jurassic, Cretaceous and Tertiary were very quiet in Shropshire, and very little evidence can be found from these periods. The last Ice Age during the Quaternary has its effect on all of Shropshire, shaping the landscape as we see it today. The Long Mynd would have been under a thick ice sheet, several hundred metres thick. As the ice melted, it carved out the valleys and hills of the Long Mynd massif we see today. The small rivers, streams and brooks still very slowly carve out the valleys.