Geologist, born at Dent, Yorkshire; graduated at Cambridge in 1808, became a Fellow in the same year, and in 1818 was elected to the Woodward chair of Geology; co-operated with Murchison in the study of the geological formation of the Alps and the Devonian system of England; strongly conservative in his scientific theories, he stoutly opposed the Darwinian theory of the origin of species; his best work was contributed in papers to the Geological Society of London, of which he was President 1829-1831; published "British Palæozoic Rocks and Fossils" (1785-1873).