Caption text Artistic impression of the Mendip region in the Silurian. Credit Paul Stevenson Key stages Key Stage 3 Key Stage 4 Key Stage 5 Higher Education Lifelong learning Themes Geology Landscape Wildlife Curriculum subject Geography Science Illustrated descriptions of the ancient environments in which the rocks of the Mendips were formed. Keywords ancient environments formation rock Silurian Devonian carboniferous Triassic Jurassic Foundations of Mendip (British Geological Survey) – Ancient Environments