Adam Sedgwick (; 22 March 1785 – 27 January 1873) was a British geologist and Anglican priest, one of the founders of modern geology. He proposed the Cambrian and Devonian period of the geological timescale. Based on work which he did on Welsh rock strata, he proposed the Cambrian period in 1835, in a joint publication in which Roderick Murchison also proposed the Silurian period. Later in 1840, to resolve what later became known as the Great Devonian Controversy about rocks near the boundary between the Silurian and Carboniferous periods, he and Murchison proposed the Devonian period.
Though he had guided the young Charles Darwin in his early study of geology and continued to be on friendly terms, Sedgwick was an opponent of Darwin's theory of evolution by means of natural selection.
He strongly opposed the admission of women to the University of Cambridge, in one conversation describing aspiring female students as "nasty forward minxes."
Life and career
Sedgwick was born in Dent, Yorkshire, the third child of an Anglican vicar. He was educated at Sedbergh School and Trinity College, Cambridge.
He studied mathematics and theology, and obtained his BA (5th Wrangler) from the University of Cambridge in 1808 and his MA in 1811. On 20 July 1817 he was ordained a deacon, then a year later he was ordained as a priest. His academic mentors at Cambridge were Thomas Jones and John Dawson. He became a Fellow of Trinity College, Cambridge and Woodwardian Professor of Geology at Cambridge from 1818, holding the chair until his death in 1873. His biography in the Cambridge Alumni database says that upon his acceptance of the position, reverend Sedgwick had no working knowledge of geology. An 1851 portrait of Sedgwick by William Boxall hangs in Trinity's collection.
Sedgwick studied the geology of the British Isles and Europe. He founded the system for the classification of Cambrian rocks and with Roderick Murchison worked out the order of the Carboniferous and underlying Devonian strata. These studies were mostly carried out in the 1830s. The investigations into the Devonian meant that Sedgwick was involved with Murchison in a vigorous debate with Henry De la Beche, in what became known as the great Devonian controversy.
He also employed John William Salter for a short time in arranging the fossils in the Woodwardian Museum at Cambridge, and whom accompanied the professor on several geological expeditions (1842–1845) into Wales.
Sedgwick investigated the phenomena of metamorphism and concretion, and was the first to distinguish clearly between stratification, jointing, and slaty cleavage. He was elected to Fellow of the Royal Society on 1 February 1821. In 1844, he was elected a Foreign Honorary Member of the American Academy of Arts and Sciences. He was president of the Geological Society of London.
Geological views and evolution
The Church of England, by no means a fundamentalist or evangelical church, encloses a wide range of beliefs. During Sedgwick's life there developed something of a chasm between the conservative high church believers and the liberal wing. After simmering for some years, the publication of Essays and Reviews by liberal churchmen in 1860 pinpointed the differences. In all this, Sedgwick, whose science and faith were intertwined in a natural theology, was definitely on the conservative side, and extremely outspoken about it. He told the February 1830 meeting of the Geological Society of London: No opinion can be heretical, but that which is not true.... Conflicting falsehoods we can comprehend; but truths can never war against each other. I affirm, therefore, that we have nothing to fear from the results of our enquiries, provided they be followed in the laborious but secure road of honest induction. In this way we may rest assured that we shall never arrive at conclusions opposed to any truth, either physical or moral, from whatever source that truth may be derived...