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Sir Roderick Impey Murchison (1792-1871), KCB DCL FRS FRSE FLS PRGS PBA MRIA was a Scottish geologist who first described and investigated the Silurian system.
1792 February 22nd. Born at Tarradale House, Muir of Ord, Ross-shire, the son of Kenneth Murchison.
1796 His wealthy father died when Roderick was 4 years old, and he was sent to Durham School three years later, and then the military college at Great Marlow to be trained for the army. In 1808 he landed with Wellesley in Galicia, and was present at the actions of Roliça and Vimeiro. Subsequently under Sir John Moore, he took part in the retreat to Corunna and the final battle there.
After eight years of service Murchison left the army, and married Charlotte Hugonin (1788–1869), the only daughter of General Hugonin, of Nursted House, Hampshire. Murchison and his wife spent two years in mainland Europe, particularly in Italy. They then settled in Barnard Castle, County Durham, England in 1818 where Murchison made the acquaintance of Sir Humphry Davy. Davy urged Murchison to turn his energy to science, after hearing that he wasted his time riding to hounds and shooting. Murchison became fascinated by the young science of geology and joined the Geological Society of London, soon becoming one of its most active members. His colleagues there included Adam Sedgwick, William Conybeare, William Buckland, William Fitton, Charles Lyell and Charles Darwin.
Exploring with his wife, Murchison studied the geology of the south of England, devoting special attention to the rocks of the north-west of Sussex and the adjoining parts of Hampshire and Surrey, on which, aided by Fitton, he wrote his first scientific paper, read to the Geological Society of London in 1825.
Turning his attention to Continental geology, he and Lyell explored the volcanic region of Auvergne, parts of southern France, northern Italy, Tyrol and Switzerland. A little later, with Sedgwick as his companion, Murchison attacked the difficult problem of the geological structure of the Alps.
In 1831 he went to the border of England and Wales, to attempt to discover whether the greywacke rocks underlying the Old Red Sandstone could be grouped into a definite order of succession. The result was the establishment of the Silurian system under which were grouped, for the first time, a remarkable series of formations, each replete with distinctive organic remains other than and very different from those of the other rocks of England. These researches, together with descriptions of the coalfields and overlying formations in South Wales and the English border counties, were embodied in The Silurian System (1839).
The establishment of the Silurian system was followed by that of the Devonian system, an investigation in which Murchison assisted, both in the south-west of England and in the Rhineland. Soon afterwards Murchison projected an important geological campaign in Russia with the view of extending to that part of the Continent the classification he had succeeded in elaborating for the older rocks of western Europe. He was accompanied by Edouard de Verneuil (1805–1873) and Count Alexander von Keyserling (1815–1891), in conjunction with whom he produced a work on Russia and the Ural Mountains. The publication of this monograph in 1845 completes the first and most active half of Murchison’s scientific career.
In 1846 he was knighted, and in the same year he presided over the meeting of the British Association at Southampton.
During the later years of his life a large part of his time was devoted to the affairs of the Royal Geographical Society, of which he was in 1830 one of the founders, and he was president 1843–1845, 1851–1853, 1856–1859 and 1862–1871. He served on the Royal Commission on the British Museum (1847–49).
The chief geological investigation of the last decade of his life was devoted to the Highlands of Scotland, where he wrongly believed he had succeeded in showing that the vast masses of crystalline schists, previously supposed to be part of what used to be termed the Primitive formations, were really not older than the Silurian period, for that underneath them lay beds of limestone and quartzite containing Lower Silurian (Cambrian) fossils. James Nicol recognised the fallacy in the Murchison's extant theory and propounded his own ideas, in the 1880s these were superseded by the correct theory of Charles Lapworth, which was corroborated by Benjamin Peach and John Horne. Their subsequent research showed that the infraposition of the fossiliferous rocks is not their original place, but had been brought about by a gigantic system of dislocations, whereby successive masses of the oldest gneisses, have been torn up from below and thrust bodily over the younger formations.
In 1855 Murchison was appointed director-general of the British Geological Survey and director of the Royal School of Mines and the Museum of Practical Geology in Jermyn Street, London, in succession to Sir Henry De la Beche, who had been the first to hold these offices. Official routine now occupied much of his time, but he found opportunity for the Highland researches just alluded to, and also for preparing successive editions of his work Siluria (1854, ed. 5, 1872), which was meant to present the main features of the original Silurian System together with a digest of subsequent discoveries, particularly of those that showed the extension of the Silurian classification into other countries.
In 1845, whilst visiting Carclew in Cornwall, he met several Cornish miners who were going to Australia. Believing that there may have been gold there he asked them to send back likely samples. They did this and thus Murchison knew of the existence of gold in Australia before Edward Hargraves' discovery.
In 1863, he was made a KCB, and three years later was created a baronet. The learned societies of his own country bestowed their highest rewards upon him: the Royal Society gave him the Copley medal, the Geological Society its Wollaston medal, and the Royal Society of Edinburgh its Brisbane Medal. There was hardly a foreign scientific society of note without his name among its honorary members. The French Academy of Sciences awarded him the prix Cuvier, and elected him one of its eight foreign members in succession to Michael Faraday. In 1855, he was elected a foreign member of the Royal Swedish Academy of Sciences.
One of the closing public acts of Murchison’s life was the founding of a chair of geology and mineralogy at the University of Edinburgh. Under his will there was established the Murchison Medal and a geological fund (The Murchison Fund) to be awarded annually by the council of the Geological Society in London.
1871 October 22nd. Died and is buried in Brompton Cemetery, London near the north end of the arcade on the west side of the central path.
The crater Murchison on the Moon and at least fifteen geographical locations on Earth are named after him. These include: Mount Murchison in the Mountaineer Range, Antarctica; Mount Murchison, just west of Squamish, British Columbia, Canada; tiny Murchison Island in the Queen Charlotte Islands in the same province; Murchison Falls (Uganda); and the Murchison River in Western Australia. Unusually, Murchison has two other rivers named after him in Western Australia: the Roderick River and the Impey River, both tributaries of the Murchison. Memorials Memorial tablet
A memorial tablet of Murchison was installed on 3 November 2005, in front of School #9 in Perm, Russia. It consists of a stone base, irregular in form, about 2 meters long and bearing a dark stone plate with the inscription:
'To Roderick Impey Murchison, Scottish geologist, explorer of Perm Krai, who gives to the last period of Paleozoic era the name of Perm.'
The decision to perpetuate the explorer's name was accepted by the school administration and pupils in connection with a discussion to establish in Perm a pillar or an arch devoted to Roderick Murchison.
In 2009, the Ural-Scottish Society erected a memorial to Murchison on the banks of the Chusovaya River.
There is a commemorative 'blue plaque' on his residence in Barnard Castle (County Durham) at 21 Galgate.
1872 Obituary 
1871 Obituary