PAUL D STEWART / SCIENCE PHOTO LIBRARY PAUL D STEWART / SCIENCE PHOTO LIBRARY
An idealised geological section drawn by Gideon Mantell to accompany his book "Wonders of Geology" 1838. It shows the nomenclature in use during the early part of the nineteenth century when geology as a science was still young. Labelled are Cumbrian (Cambrian), Silurian, Carboniferous, Saliferous (Devonina/Permian) Lias (lower Jurassic), Oolite (upper Jurassic), Wealden (middle Cretaceous), Chalk (upper Cretaceous), Tertiary, and Alluvium (Quaternary/Pleistocene). The layers exposed on the cliff are the primary fossil-yielding beds.
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