While digging the Somerset Coal Canal in southwest England, he found that fossils were always in the same order in the rock layers.
Radiocarbon dating | radiocarbon dating | Ang Dating Daan | Relative Silence | Relative direction | Radiometric dating | radiometric dating | Uranium-thorium dating | uranium-thorium dating | Thermoluminescence dating | thermoluminescence dating | Rubidium-strontium dating | Relative key | Optical dating | Obsidian hydration dating | List of mountains of the British Isles by relative height | ''Dating in the Dark'' | Blind Dating | Badger Books SF-58 and SF-61, both dating from 1961 and bearing the byline "John E. Muller" -- but "The Mind Makers" is by Lionel Fanthorpe |