{{Short description|Scottish geologist (1797–1875)}}
{{Other people}}
{{Use British English|date=November 2013}}
{{Use dmy dates|date=November 2021}}
{{Infobox scientist
| honorific_prefix = Sir
| name = Charles Lyell
| honorific_suffix = {{postnominals|country=GBR|size=100%|Bt|FRS}}
| image = Charles Lyell00.jpg
| caption = Portrait of Lyell by George J. Stodart
| birth_date = {{birth date|1797|11|14|df=y}}
| birth_place = [[Kinnordy House]], Angus, Scotland
| death_date = {{death date and age|df=y|1875|2|22|1797|11|14}}
| death_place = [[Harley Street]], London, England
| resting_place = The Nave of [[Burials and memorials in Westminster Abbey#Nave|Westminster Abbey]]
| residence =
| field = Geology
| workplaces = [[King's College London]]
| education = [[Exeter College, Oxford]]
| known_for = [[Uniformitarianism]]
| author_abbrev_bot =
| author_abbrev_zoo =
| awards = [[Royal Medal]] (1834)
[[Copley Medal]] (1858)
[[Wollaston Medal]] (1866)
| footnotes =
| signature =
| spouse = [[Mary Horner Lyell]]
}}
'''Sir Charles Lyell, 1st Baronet''' (14 November 1797 – 22 February 1875) was a Scottish geologist who demonstrated the power of known natural causes in explaining the earth's history. He is best known today for his association with [[Charles Darwin]] and as the author of ''[[Principles of Geology]]'' (1830–33), which presented to a wide public audience the idea that the earth was shaped by the same natural processes still in operation today, operating at similar intensities. The philosopher [[William Whewell]] dubbed this [[gradualism|gradualistic]] view "[[uniformitarianism]]" and contrasted it with [[catastrophism]], which had been championed by [[Georges Cuvier]] and was better accepted in Europe.{{sfnp|Cannon|1961|pp=301–314}} The combination of evidence and eloquence in ''Principles'' convinced a wide range of readers of the significance of "[[deep time]]" for understanding the earth and environment.{{sfn|McPhee|1982|p=}}
Lyell's scientific contributions included a pioneering explanation of climate change, in which shifting boundaries between oceans and continents could be used to explain long-term variations in temperature and rainfall. Lyell also gave influential explanations of earthquakes and developed the theory of gradual "backed up-building" of [[volcano]]es. In [[stratigraphy]] his division of the [[Tertiary (period)|Tertiary]] period into the [[Pliocene]], [[Miocene]], and [[Eocene]] was highly influential. He incorrectly conjectured that icebergs were the impetus behind the transport of [[glacial erratic]]s, and that silty [[loess]] deposits might have settled out of flood waters. His creation of a separate period for human history, entitled the 'Recent', is widely cited as providing the foundations for the modern discussion of the [[Anthropocene]].{{cite web |last1=Crutzen |first1=Paul |title=The 'Anthropocene' |url=http://www.igbp.net/download/18.316f18321323470177580001401/1376383088452/NL41.pdf |archive-url=https://web.archive.org/web/20150418122558/http://www.igbp.net/download/18.316f18321323470177580001401/1376383088452/NL41.pdf |archive-date=2015-04-18 |url-status=live |access-date=16 May 2019}}
Building on the innovative work of [[James Hutton]] and his follower [[John Playfair]], Lyell favoured an indefinitely long age for the earth, despite evidence suggesting an old but finite age.{{sfnp|Rudwick|2014|p=}} He was a close friend of [[Charles Darwin]], and contributed significantly to Darwin's thinking on the processes involved in evolution. As Darwin wrote in ''[[On the Origin of Species]]'', "He who can read Sir Charles Lyell's grand work on the Principles of Geology, which the future historian will recognise as having produced a revolution in natural science, yet does not admit how incomprehensibly vast have been the past periods of time, may at once close this volume."{{cite web |last1=Darwin |first1=Charles |title=On the Origin of Species |url=http://darwin-online.org.uk/content/frameset?itemID=F373&viewtype=side&pageseq=1 |website=Complete Works of Charles Darwin Online |publisher=John Murray |access-date=16 May 2019}} Lyell helped to arrange the simultaneous publication in 1858 of papers by Darwin and [[Alfred Russel Wallace]] on [[natural selection]], despite his personal religious qualms about the theory. He later published evidence from geology of the time man had existed on the earth.
==Biography==
Lyell was born into a wealthy family, on 14 November 1797, at the family's [[estate house]], [[Kinnordy House]], near [[Kirriemuir]] in Forfarshire. He was the eldest of ten children. Lyell's father, also named [[Charles Lyell (botanist)|Charles Lyell]], was noted as a translator and scholar of [[Dante]]. An accomplished botanist, it was he who first exposed his son to the study of nature. Lyell's grandfather, also Charles Lyell, had made the family fortune supplying the [[Royal Navy]] at [[Montrose, Angus|Montrose]], enabling him to buy Kinnordy House.
[[File:Scotland (Location) Named (HR).png|thumb|The main geographical
divisions of Scotland]]
The [[family seat]] is located in [[Strathmore, Angus|Strathmore]], near the [[Highland Boundary Fault]]. Round the house, in the [[strath]], is good farmland, but within a short distance to the north-west, on the other side of the fault, are the [[Grampian Mountains]] in the [[Scottish Highlands|Highlands]]. His family's second country home was in a completely different geological and ecological area: he spent much of his childhood at [[Bartley Lodge]] in the [[New Forest]], in Hampshire in southern England.
Lyell entered [[Exeter College, Oxford]], in 1816, and attended [[William Buckland]]'s geological lectures. He graduated with a BA Hons. second class degree in classics, in December 1819, and gained his [[Master of Arts (Oxbridge and Dublin)|M.A.]] 1821.{{sfnp|Bailey|1962|p=}}{{sfn|Wilson|1973}} After graduation he took up law as a profession, entering [[Lincoln's Inn]] in 1820. He completed a circuit through rural England, where he could observe geological phenomena. In 1821 he attended [[Robert Jameson]]'s lectures in Edinburgh, and visited [[Gideon Mantell]] at [[Lewes]], in [[Sussex]]. In 1823 he was elected joint secretary of the [[Geological Society]]. As his eyesight began to deteriorate, he turned to geology as a full-time profession.{{sfn|Wilson|1973}} His first paper, "On a recent formation of freshwater limestone in Forfarshire", was presented in 1826.{{sfn|Wilson|1973}} By 1827, he had abandoned law and embarked on a geological career that would result in fame and the general acceptance of uniformitarianism, a working out of the ideas proposed by [[James Hutton]] a few decades earlier.
[[File:Lyell 1840.jpg|left|thumb|Charles Lyell at the [[British Association]] meeting in Glasgow 1840. Painting by Alexander Craig.]]
In 1832, Lyell married [[Mary Horner]] in Bonn, daughter of [[Leonard Horner]] (1785–1864), also associated with the [[Geological Society of London]]. The new couple spent their honeymoon in Switzerland and Italy on a geological tour of the area.{{sfn|MaComber|1997}}
During the 1840s, Lyell travelled to the United States and Canada, and wrote two popular travel-and-geology books: ''Travels in North America'' (1845) and ''A Second Visit to the United States'' (1849). In 1866, he was elected a foreign member of the [[Royal Swedish Academy of Sciences]]. After the [[Great Chicago Fire]] in 1871, Lyell was one of the first to donate books to help found the [[Chicago Public Library]].
In 1841, Lyell was elected as a member to the [[American Philosophical Society]].{{Cite web|title=APS Member History|url=https://search.amphilsoc.org/memhist/search?creator=&title=&subject=&subdiv=&mem=&year=1842&year-max=1842&dead=&keyword=&smode=advanced|access-date=2021-04-12|website=search.amphilsoc.org}}
Lyell's wife died in 1873, and two years later (in 1875) Lyell himself died as he was revising the twelfth edition of ''Principles''.{{sfn|MaComber|1997}}{{Cite web |title=Charles Lyell |work=Westminster Abbey |access-date=8 September 2018 |url= https://www.westminster-abbey.org/abbey-commemorations/commemorations/charles-lyell/ }} He is buried in [[Westminster Abbey]] where there is a bust to him by [[William Theed]] in the north aisle.{{sfn|Hall|1966|p=53}}
Lyell was knighted ([[Knight Bachelor|Kt]]) in 1848,{{London Gazette |issue=20905 |date=13 October 1848 |page=3692}} and later, in 1864, made a baronet ([[Baronet|Bt]]),{{London Gazette |issue=22878 |date=22 July 1864 |page=3665}} which is an hereditary honour. He was awarded the [[Copley Medal]] of the [[Royal Society]] in 1858 and the [[Wollaston Medal]] of the [[Geological Society]] in 1866. [[Mount Lyell (California)|Mount Lyell]], the highest peak in [[Yosemite National Park]], is named after him; the crater [[Lyell (lunar crater)|Lyell]] on the [[Moon]] and a [[Impact crater|crater]] on [[Mars]] were named in his honour; [[Mount Lyell (Tasmania)|Mount Lyell]] in western Tasmania, Australia, located in a profitable mining area, bears Lyell's name; and the Lyell Range in north-west Western Australia is named after him as well. In Southwest Nelson in the South Island of New Zealand, the Lyell Range, Lyell River and the gold mining town of [[Lyell, New Zealand|Lyell]] (now only a camping site) were all named after Lyell.{{Cite web |title=Lyell |first=Steph |last=Russell |work=theprow.org.nz |date=2011 |access-date=8 September 2018 |url= http://www.theprow.org.nz/yourstory/lyell/#.W5OjmOgza02 }} [[Lyall Bay]] in Wellington, New Zealand was possibly named after Lyell.{{Cite news |date=5 August 1908 |title=The empire city: street and harbour nomenclature |work=Wairarapa Daily Times |url=https://paperspast.natlib.govt.nz/newspapers/WDT19080805.2.49 |access-date=10 November 2022 |via=Paperspast}}{{Cite news |last=Hayward |first=H. M. |date=9 April 1910 |title=Lyell or Lyall? |work=Evening Post |url=https://paperspast.natlib.govt.nz/newspapers/EP19100409.2.22 |access-date=10 November 2022 |via=Paperspast}} The jawless fish ''[[Cephalaspis]] lyelli'', from the [[Old Red Sandstone]] of southern Scotland, was named by [[Louis Agassiz]] in honour of Lyell.{{sfnp|White|1958|pp=99–105}}
Sir Charles Lyell was buried at [[Westminster Abbey]] on 27 February 1875. The pallbearers included [[Thomas Henry Huxley|T. H. Huxley]], [[William Samuel Symonds|the Rev. W. S. Symonds]] and Mr [[John Carrick Moore]].{{cite news | title = Funeral of Sir Charles Lyell this day | newspaper = The Sun | location = London | page = 5| date = 27 February 1875}}
==Career and major writings==
Lyell had private means, and earned further income as an author. He came from a prosperous family, worked briefly as a lawyer in the 1820s, and held the post of Professor of Geology at [[King's College London]] in the 1830s. From 1830 onward his books provided both income and fame. Each of his three major books was a work continually in progress. All three went through multiple editions during his lifetime, although many of his friends (such as Darwin) thought the first edition of the ''Principles'' was the best written.{{cite book |last=Darwin |first=F. |year=1887 |title=Life and letters of Charles Darwin |volume=II |page=90 |location=London |publisher=John Murray }}{{cite book |last1=Darwin |first1=F |last2=Seward |first2=A.C. |year=1903 |title=More letters of Charles Darwin |volume=II |page=232 |location=London |publisher=John Murray }} Lyell used each edition to incorporate additional material, rearrange existing material, and revisit old conclusions in light of new evidence.
[[File:C Lyell notebook page 1.jpg|alt=Pen drawing of one of Charles Lyell's ideas|thumb|A page from one of Lyell's notebooks, held in the [[University of Edinburgh]]'s Heritage Collections]]
Throughout his life, Lyell kept a remarkable series of nearly three hundred manuscript notebooks and diaries. These span Lyell's long scientific career (1825–1874), and offer an unrivalled insight into personal influences, field observations, thoughts and relationships. They were acquired in 2019 by the [[University of Edinburgh]]'s Heritage Collections, thanks to a fundraising campaign, with many generous individual and institutional donors from the UK and overseas. Highlights include his travels throughout Europe and the United States of America, the drafts of his correspondence with the likes of Charles Darwin, his geological and landscape sketches and his constant gathering of evidence and refinement of his theories.{{Cite web |title=The Sir Charles Lyell Collection |url=https://www.ed.ac.uk/information-services/library-museum-gallery/cultural-heritage-collections/crc/sir-charles-lyell-collection |access-date=2023-01-12 |website=The University of Edinburgh |language=en}} Lyell's collection held at the University of Edinburgh, including digital images of his five series of notebooks, and with links to other Lyell material held elsewhere, is now available on a [https://lyell.ed.ac.uk/ dedicated website].
''[[Principles of Geology]]'', Lyell's first book, was also his most famous, most influential, and most important. First published in three volumes in 1830–33, it established Lyell's credentials as an important geological theorist and propounded the doctrine of [[Uniformitarianism (science)|uniformitarianism]].{{sfn|Thanukos|2012}} It was a work of synthesis, backed by his own personal observations on his travels.
The central argument in ''Principles'' was that ''the present is the key to the past'' – a concept of the [[Scottish Enlightenment]] which [[David Hume]] had stated as "all inferences from experience suppose ... that the future will resemble the past", and [[James Hutton]] had described when he wrote in 1788 that "from what has actually been, we have data for concluding with regard to that which is to happen thereafter."{{cite web |url=http://gsa.confex.com/gsa/2002CD/finalprogram/abstract_34786.htm |title=The Present is the Key to the Past is the Key to the Future |first=Elizabeth Lincoln |last=Mathieson |date=13 May 2002 |publisher=The Geological Society of America |access-date=28 September 2010 |archive-url=https://web.archive.org/web/20160309124435/https://gsa.confex.com/gsa/2002CD/finalprogram/abstract_34786.htm |archive-date=9 March 2016 |url-status=dead }} Geological remains from the distant past can, and should, be explained by reference to geological processes now in operation and thus directly observable. Lyell's interpretation of geological change as the steady accumulation of minute changes over enormously long spans of time was a powerful influence on the young [[Charles Darwin]]. Lyell asked [[Robert FitzRoy]], captain of [[HMS Beagle|HMS ''Beagle'']], to search for erratic boulders on the [[Second voyage of HMS Beagle|survey voyage of the ''Beagle'']], and just before it set out FitzRoy gave Darwin Volume 1 of the first edition of Lyell's ''Principles''. When the ''Beagle'' made its first stop ashore at [[Santiago, Cape Verde|St Jago]] in the [[Cape Verde]] islands, Darwin found rock formations which seen "through Lyell's eyes" gave him a revolutionary insight into the geological history of the island, an insight he applied throughout his travels.
While in South America Darwin received Volume 2 which considered the ideas of [[Jean-Baptiste Lamarck]] in some detail. Lyell rejected Lamarck's idea of organic [[evolution]], proposing instead "Centres of Creation" to explain diversity and territory of species. However, as discussed [[#Evolution|below]], many of his letters show he was fairly open to the idea of evolution.{{sfnp|Judd|1910|p=}} In geology Darwin was very much Lyell's disciple, and brought back observations and his own original theorising, including ideas about the formation of [[atoll]]s, which supported Lyell's uniformitarianism. On the return of the ''Beagle'' (October 1836) Lyell invited Darwin to dinner and from then on they were close friends.
[[File:Lyell Principles frontispiece.jpg|thumb|The frontispiece from ''Elements of Geology'']]Although Darwin discussed evolutionary ideas with him from 1842, Lyell continued to reject evolution in each of the first nine editions of the ''Principles''. He encouraged Darwin to publish, and following the 1859 publication of ''[[On the Origin of Species]]'', Lyell finally offered a tepid endorsement of evolution in the tenth edition of ''Principles''.
''Elements of Geology'' began as the fourth volume of the third edition of ''[[Principles of Geology|Principles]]'': Lyell intended the book to act as a suitable field guide for students of geology.{{sfnp|Bailey|1962|p=}} The systematic, factual description of geological formations of different ages contained in ''Principles'' grew so unwieldy, however, that Lyell split it off as the ''Elements'' in 1838. The book went through six editions, eventually growing to two volumes and ceasing to be the inexpensive, portable handbook that Lyell had originally envisioned. Late in his career, therefore, Lyell produced a condensed version titled ''Student's Elements of Geology'' that fulfilled the original purpose.
''[[Geological Evidences of the Antiquity of Man]]'' brought together Lyell's views on three key themes from the geology of the [[Quaternary Period]] of earth history: glaciers, evolution, and the [[age of the human race]]. First published in 1863, it went through three editions that year, with a fourth and final edition appearing in 1873. The book was widely regarded as a disappointment because of Lyell's equivocal treatment of [[evolution]]. Lyell, a highly religious man with a strong belief in the special status of human reason, had great difficulty reconciling his beliefs with [[natural selection]].{{sfnp|Bynum|1984|pp=153–187}}[[File:Awfulchanges.jpg|thumb|"Professor [[Ichthyosaurus]]" shows his pupils the skull of extinct man, caricature of Lyell by [[Henry De la Beche]] (1830)]]
==Scientific contributions==
Lyell's geological interests ranged from [[volcano]]es and geological dynamics through [[stratigraphy]], [[palaeontology]], and [[glaciology]] to topics that would now be classified as [[archaeology|prehistoric archaeology]] and [[paleoanthropology]]. He is best known, however, for his role in elaborating the doctrine of [[Uniformitarianism (science)|uniformitarianism]]. He played a critical role in advancing the study of [[loess]].{{sfnp|Smalley|Gaudenyi|Jovanovic|2015|pp=45–50}}
===Uniformitarianism===
From 1830 to 1833 his multi-volume ''[[Principles of Geology]]'' was published. The work's subtitle was "An attempt to explain the former changes of the earth's surface by reference to causes now in operation", and this explains Lyell's impact on science. He drew his explanations from field studies conducted directly before he went to work on the founding geology text.{{sfn|Wilson|1973}} He was, along with the earlier [[John Playfair]], the major advocate of [[James Hutton]]'s idea of [[Uniformitarianism (science)|uniformitarianism]], that the earth was shaped entirely by slow-moving forces still in operation today, acting over a very long time. This was in contrast to [[catastrophism]], an idea of abrupt geological changes, which had been adapted in England to explain landscape features—such as rivers much smaller than their associated valleys—that seemed impossible to explain other than through violent action. Criticizing the reliance of his contemporaries on what he argued were ''ad hoc'' explanations, Lyell wrote,
[[File:Sir Charles Lyell, 1st Bt.jpg|thumb|Lyell between 1865 and 1870]]
Never was there a doctrine more calculated to foster indolence, and to blunt the keen edge of curiosity, than this assumption of the discordance between the former and the existing causes of change... The student was taught to despond from the first. Geology, it was affirmed, could never arise to the rank of an exact science... [With catastrophism] we see the ancient spirit of speculation revived, and a desire manifestly shown to cut, rather than patiently untie, the Gordian Knot.-Sir Charles Lyell, ''[[Principles of Geology]]'', 1854 edition, p. 196; quoted by [[Stephen Jay Gould]].{{cite book |last=Galilei |first=Galileo |title=Dialogue on the Two Chief World Systems |year=2001 |publisher=Modern Science Library |location=New York |pages=ix–x |editor=Stephen Jay Gould}}Lyell saw himself as "the spiritual saviour of geology, freeing the science from the old dispensation of Moses."{{sfn|Porter|1976|p=91}} The two terms, ''uniformitarianism'' and ''catastrophism'', were both coined by [[William Whewell]];Whewell, William 1837. ''History of the Inductive Sciences'', vol. IV of the Historical and Philosophical Works of William Whewell. Chapter VIII The two antagonistic doctrines of geology. [reprint of 3rd edition of 1857, publ. Cass 1967]. in 1866 R. Grove suggested the simpler term ''continuity'' for Lyell's view, but the old terms persisted. In various revised editions (12 in all, through 1872), ''Principles of Geology'' was the most influential geological work in the middle of the 19th century and did much to put geology on a modern footing. ===Geological surveys=== Lyell noted the "economic advantages" geological surveys could provide, citing their felicity in mineral-rich countries and provinces. Modern surveys, like the [[British Geological Survey]] (founded in 1835), and the [[US Geological Survey]] (founded in 1879), map and exhibit the natural resources within their countries. Over time, these surveys have been used extensively by modern extractive industries, such as nuclear, coal, and oil. ===Volcanoes and geological dynamics=== [[File:Vesuvius from plane.jpg|thumb|Lyell argued that volcanoes like [[Vesuvius]] had built up gradually.]] Before Lyell's work, phenomena such as earthquakes were understood by the destruction that they brought. One of the contributions that Lyell made in ''Principles'' was to explain the cause of earthquakes.{{sfnp|Adams|1938|p=}} Lyell, in contrast, focused on more recent earthquakes (150 yrs), evidenced by surface irregularities such as faults, fissures, stratigraphic displacements and depressions.{{sfnp|Adams|1938|p=}} Lyell's work on volcanoes focused largely on [[Vesuvius]] and [[Mount Etna|Etna]], both of which he had earlier studied. His conclusions supported gradual building of volcanoes, so-called "backed up-building",{{sfnp|Bailey|1962}} as opposed to the upheaval argument supported by other geologists. ===Stratigraphy and human history=== Lyell was a key figure in establishing the classification of more recent geological deposits, long known as the [[Tertiary (period)|Tertiary]] period. From May 1828, until February 1829, he travelled with [[Roderick Impey Murchison]] (1792–1871) to the south of France (Auvergne volcanic district) and to Italy.{{sfnp|Bailey|1962}}{{sfn|MaComber|1997}}{{sfnp|Stafford|1989|p=}} In these areas he concluded that the recent strata (rock layers) could be categorised according to the number and proportion of marine shells encased within. Based on this the third volume of his ''[[Principles of Geology]]'', published in 1833, proposed dividing the [[Tertiary (period)|Tertiary]] period into four parts, which he named the [[Eocene]], [[Miocene]], [[Pliocene]], and Recent. In 1839, Lyell termed the [[Pleistocene]] epoch, distinguishing a more recent fossil layer from the Pliocene.{{cite book |last=Lyell |first=Charles |title=Nouveaux éléments de géologie |date=1839 |publisher=Pitois-Levranet |location=Paris, France |page=621 |url=https://archive.org/stream/elmentsdegologi00meulgoog#page/n657/mode/2up |language=fr}} The Recent epoch{{snd}} renamed the [[Holocene]] by French paleontologist [[Paul Gervais]] in 1867{{snd}} included all deposits from the era subject to human observation. In recent years Lyell's subdivisions have been widely discussed with debates about the [[Anthropocene]]. ===Glaciers=== [[File:glacier.zermatt.arp.750pix.jpg|thumb|[[Lateral moraine]] on a glacier joining the [[Gorner Glacier]], Zermatt, Switzerland.]] In ''Principles of Geology'' (first edition, vol. 3, ch. 2, 1833){{sfn|MaComber|1997}} Lyell proposed that [[iceberg]]s could be the means of transport for [[Glacial erratic|erratics]]. During periods of global warming, ice breaks off the poles and floats across submerged continents, carrying debris with it, he conjectured. When the iceberg melts, it rains down sediments upon the land. Because this theory could account for the presence of diluvium, the word ''drift'' became the preferred term for the loose, unsorted material, today called ''till''. Furthermore, Lyell believed that the accumulation of fine angular particles covering much of the world (today called [[loess]]) was a deposit settled from mountain flood water.{{cite book|last=Lyell|first=Charles|title=Life, Letters and Journals of Sir Charles Lyell|year=1881|page=110|chapter=XXIV|publisher=[[John Murray (publishing house)|John Murray]]| chapter-url=https://archive.org/stream/lifelettersandj01lyelgoog#page/n130/mode/2up|quote=