William Morris Davis
|William Morris Davis|
February 12, 1850|
|Died||February 5, 1934
|Known for||cycle of erosion; peneplains; often called the "father of American geography"|
|Awards||Vega Medal (1920)
Penrose Medal (1931)
|Fields||Geography, Geomorphology, Geology, Meteorology|
Douglas Wilson Johnson
He was born into a Quaker family in Philadelphia, Pennsylvania, son of Edward M. Davis and Maria Mott Davis (a daughter of the women's advocate Lucretia Mott). He graduated from Harvard University in 1869 and received a Master of Engineering in the following year.
Davis initially worked in Córdoba, Argentina as a meteorologist for three years and after working as an assistant to Nathaniel Shaler, he became an instructor in geology at Harvard, in 1879. The same year he married Ellen B. Warner from Springfield, Massachusetts. While Davis never completed his PhD, he was appointed to his first full professorship in 1890 and remained in academia and teaching throughout his life.
Davis' most influential scientific contribution was the "geographical cycle", first defined in his 1889 article, The Rivers and Valleys of Pennsylvania, which was a model of how rivers erode uplifted land to base level. His cycle of erosion suggests that (larger) rivers have three main stages of development, generally divided into youthful, mature and old-age stages. Each stage has distinct landforms and other properties associated with them, which can occur along the length of a river's upper, middle, and lower course.
Though the cycle of erosion was a crucial early contribution to the development of geomorphology, many of Davis' theories regarding landscape evolution, sometimes termed 'Davisian geomorphology', were heavily criticized by later geomorphologists. When Davis retired from Harvard in 1911, the study of landscape evolution was nearly monopolized by his theories. It was characteristic of Davis to react violently and disdainfully to criticism, particularly to the German criticism in the 1920s headed by Walther Penck; it was also his characteristic to choose to attack the most vulnerable points of that criticism. Since that time, with a less dogmatic approach and greater knowledge, some authors note that Penck's and Davis' ideas have become more compatible and even complementary since the advent of modern tectonic theory. They claim that Davis' ideas are more applicable near active margins where tectonics are "cataclysmic", and Penck's ideas fit better in models of passive margins and continental platforms.
He was a founder of the Association of American Geographers in 1904, and heavily involved with the National Geographic Society in its early years, writing a number of articles for the magazine. Davis retired from Harvard in 1911. He was awarded the Patron's Gold Medal of the Royal Geographical Society in 1919. 
- Geographical Essays (Boston: Ginn, 1909).
- "Geographic methods in geologic investigations", National Geographic Magazine 1: pp. 11–26 (1888)
- "The Rivers and Valleys of Pennsylvania", National Geographic Magazine 1: pp. 183–253 (1889)
- "The geographical cycle", Geographical Journal, vol. 14, pp. 481–504 (1899). Accessible from JSTOR
- "The Physical Geography of the Lands", Popular Science Monthly 2: pp. 157–170 (1900)
- Pruyne, John; Jon T. Kilpinen (1996-11-02). "William Morris Davis". Valparaiso University Department of Geography and Meteorology. Retrieved 2010-08-18.
Davis' contributions cover the separate fields of geography, geology, and meteorology.
- Chorley, Richard J.; Beckinsale, Robert P.; Dunn, Antony J. (2005) . "Chapter Twenty-Two". The History of the Study of Landforms. Volume Two. Taylor & Francis e-Library. p. 569.
- Ford, Derek (2007). "Jovan Cvijić and the founding of karst geomorphology". Environmental Geology. 51: 675–684. doi:10.1007/s00254-006-0379-x.
- Walter H. Bunch (1946). "Biographical Memoir of Douglas Wilson Johnson 1878–1944" (PDF). National Academy Of Sciences. Retrieved 2017-09-20.
- Chorley et al. 2005, p. 614
- Gjessing, Just (1967). "Norway's Paleic Surface". Norsk Geografisk Tidsskrift. 21 (2): 69–132. doi:10.1080/00291956708621854.
- Robert L Bates, Julia A Jackson, ed. Dictionary of Geological Terms: Third Edition, p. 125 (1984) American Geological Institute
- Chorley et al. 2005, p. 519
- Saadi, Allaoua (2013), "Modelos morfogenéticos e tectônica global: Reflexőes conciliatórias", Geonomos (in Portuguese), 6 (2): 55–63
- "List of Past Gold Medal Winners" (PDF). Royal Geographical Society. Retrieved 24 August 2015.
- "Davisdalen (Svalbard)". Norwegian Polar Institute. Retrieved 24 February 2015.
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William Morris Davis