John Tuzo Wilson

John Tuzo Wilson CC OBE FRS FRSE FRSC
John Tuzo Wilson in 1992
Born	(1908-10-24)October 24, 1908 Ottawa, Ontario, Canada
Died	April 15, 1993(1993-04-15) (aged 84) Toronto, Ontario, Canada
Alma mater	University of Toronto University of Cambridge Princeton University
Known for	Theory of Plate tectonics
Awards	Officer, Order of Canada Companion, Order of Canada Fellow, Royal Society of Canada Fellow, Royal Society of London[1] Fellow, Royal Society of Edinburgh Legion of Merit Order of the British Empire Maurice Ewing Medal, AGU Maurice Ewing Medal, SEG Bucher Medal, SEG Penrose Medal, GSA Wegener Medal, EUG Wollaston Medal, Geological Society Vetlesen Prize, Columbia University Canada Centennial Medal 125th Anniversary Medal (Canada) John J. Carty Award (1975)
Scientific career
Fields	Geophysics & geology
Institutions	University of Toronto
Thesis	The Geology of the Mill creek - Stillwater Area, Montana (1936)
Doctoral advisor	William Taylor Thom, Jr
Doctoral students	Harold Williams
Notes
[2]

John Tuzo Wilson (October 24, 1908 – April 15, 1993) was a Canadian geophysicist and geologist who achieved worldwide acclaim for his contributions to the theory of plate tectonics.

Plate tectonics is the scientific theory that the rigid outer layers of the Earth (crust and part of the upper mantle), the lithosphere, is broken up into around 13 pieces or "plates" that move independently over the weaker asthenosphere. Wilson maintained that the Hawaiian Islands were formed as a tectonic plate (extending across much of the Pacific Ocean) shifted to the northwest over a fixed hotspot, spawning a long series of volcanoes. He also conceived of the transform fault, a major plate boundary where two plates move past each other horizontally (e.g., the San Andreas Fault).

His name was given to two young Canadian submarine volcanoes called the Tuzo Wilson Seamounts.^[3] The Wilson cycle of seabed expansion and contraction (associated with the Supercontinent cycle) bears his name. One of the two large low-shear-velocity provinces was given the name Tuzo after him, the other being named Jason after W. Jason Morgan, who furthered Wilson's work into plume theory.

Wilson was born in Ottawa on October 24, 1908, the son of John Armistead Wilson CBE, and his wife, Henrietta Tuzo.^[4] Wilson's father was of Scottish descent and his mother was a third-generation Canadian of French descent.

He became one of the first people in Canada to receive a degree in geophysics, graduating from Trinity College at the University of Toronto in 1930.^[5] He obtained a second (BA) degree from St. John's College, Cambridge in 1932 and then a doctorate (ScD). He then pursued further graduate studies as Princeton University, where he received a Ph.D. in geology in 1936 after completing a doctoral dissertation titled "The Geology of the Mill creek - Stillwater Area, Montana."^[6]

In 1936, Wilson joined the Geological Survey of Canada as a government geologist. This was interrupted by the Second World War during which he served with the Royal Canadian Engineers, serving in Europe and reaching the rank of Colonel. He was involved in Operation Musk Ox.^[7] For his wartime service, he was appointed an OBE.

In 1946 he was appointed the first Professor of Geophysics at the University of Toronto.

He made significant contributions to the theory of Plate tectonics, adding a concept of hot spots. Plate tectonics is the scientific theory that the rigid outer layers of the Earth (crust and part of the upper mantle), the lithosphere, is broken up into around 13 pieces or "plates" that move independently over the weaker asthenosphere. Wilson maintained that the Hawaiian Islands were created as a tectonic plate (extending across much of the Pacific Ocean) shifted to the northwest over a fixed hotspot, spawning a long series of volcanoes. He also conceived of the transform fault, a major plate boundary where two plates move past each other horizontally (e.g., the San Andreas Fault).

The Wilson cycle of seabed expansion and contraction (associated with the Supercontinent cycle) bears his name, in recognition of his iconic observation that the present-day Atlantic Ocean appears along a former suture zone^[8] and his development in a classic 1968 paper^[9] of what was later named the "Wilson cycle" in 1975 by Kevin C. A. Burke, a colleague and friend of Wilson.^[10]

His name was given to two young Canadian submarine volcanoes called the Tuzo Wilson Seamounts.^[11]

Wilson was president (1957–1960) of the International Union of Geodesy and Geophysics (IUGG).

In 1967 he became principal of Erindale College, now known as University of Toronto Mississauga. In 1974 he left to become the Director General of the Ontario Science Centre. In 1983 he became Chancellor of York University, Toronto.

He was the host of the television series The Planet of Man.

For his service during the Second World War, Wilson was appointed an Officer of the Order of the British Empire in 1946. In 1969, he was made an Officer of the Order of Canada and was promoted to the rank of Companion of that order in 1974.^[12] He was elected to the American Academy of Arts and Sciences in 1971 and the American Philosophical Society in 1971.^[13][14] Wilson was awarded the John J. Carty Award from the National Academy of Sciences, of which he was already a member, in 1975.^[15][16] In 1978, he was awarded the Wollaston Medal of the Geological Society of London and a Gold Medal by the Royal Canadian Geographical Society. He also served as honorary vice president of the RCGS.^[17] He was a Fellow of the Royal Society, the Royal Society of Canada, and of the Royal Society of Edinburgh.^[18]

He was elected president-elect (1978–1980) and president (1980–1982) of the American Geophysical Union. He also served as the director general of the Ontario Science Centre from 1974 to 1985.

Wilson and his plate tectonic theory are commemorated on the grounds of the Centre by a giant "immovable" spike that records the amount of plate movement since Wilson's birth.

The J. Tuzo Wilson Medal of the Canadian Geophysical Union recognizes achievements in geophysics. He is also commemorated by a named memorial professorship and an eponymous annual public lecture delivered at the University of Toronto.

He is one of the 2016 inductees into Legends Row: Mississauga Walk of Fame.^[19]

Wilson was an avid traveller and took a large number of photographs during his travels to many destinations, including European countries, parts of the then USSR, China, the southern Pacific, Africa, and to both polar regions. Although many of his photos are geological—details of rocks and their structures or panoramas of large formations—the bulk of his photos are of the places, activities and people that he saw on his travels: landscapes, city views, monuments, sites, instruments, vehicles, flora and fauna, occupations and people.

In 1938 he married Isabel Jean Dickson.^[1]

He retired in 1986 and died in Toronto on April 15, 1993.

• One Chinese Moon (1959)
• Wilson, Tuzo (July 14, 1962). "Cabot Fault, An Appalachian Equivalent of the San Andreas and Great Glen Faults and some Implications for Continental Displacement". Nature. 195 (4837): 135–138. Bibcode:1962Natur.195..135W. doi:10.1038/195135a0. S2CID 4289725.
• Wilson, J. Tuzo (February 9, 1963). "Evidence from Islands on the Spreading of Ocean Floors". Nature. 197 (4867): 536–538. Bibcode:1963Natur.197..536W. doi:10.1038/197536a0. S2CID 4255932.
• Wilson, J. Tuzo (1963). "A Possible Origin of the Hawaiian Islands" (PDF). Canadian Journal of Physics. 41 (6): 863–870. Bibcode:1963CaJPh..41..863W. doi:10.1139/p63-094.
• Wilson, J. Tuzo (July 24, 1965). "A new Class of Faults and their Bearing on Continental Drift". Nature. 207 (4995): 343–347. Bibcode:1965Natur.207..343W. doi:10.1038/207343a0. S2CID 4294401.
• Vine, F. J.; Wilson, J. Tuzo (October 22, 1965). "Magnetic Anomalies over a Young Oceanic Ridge off Vancouver Island". Science. 150 (3695): 485–9. Bibcode:1965Sci...150..485V. CiteSeerX 10.1.1.473.7395. doi:10.1126/science.150.3695.485. PMID 17842754. S2CID 41107379.
• Wilson, J. Tuzo (August 13, 1966). "Did the Atlantic close and then re-open?". Nature. 211 (5050): 676–681. Bibcode:1966Natur.211..676W. doi:10.1038/211676a0. S2CID 4226266.
• Wilson, J. Tuzo (1966). "Are the structures of the Caribbean and Scotia arc regions analogous to ice rafting?". Earth and Planetary Science Letters. 1 (5): 335–338. Bibcode:1966E&PSL...1..335T. doi:10.1016/0012-821X(66)90019-7.
• Wilson, J. Tuzo (December 1968). "A Revolution in Earth Science". Geotimes. 13 (10). Washington DC: 10–16.
• Wilson, J. Tuzo (1971). "Du Toit, Alexander Logie". Dictionary of Scientific Biography. Vol. 4. pp. 261–263.

• List of geophysicists
• Science and technology in Canada

• "J. Tuzo Wilson". GSA Today, Rock Stars. September 2001. Retrieved October 14, 2013.

• West, Gordon F.; Farquhar, Ron M.; Garland, George D.; Halls, Henry C.; Morley, Lawrence W.; Russell, R. Don (January 2014). "John Tuzo Wilson: a man who moved mountains". Canadian Journal of Earth Sciences. 51 (3): xvii–xxxi. Bibcode:2014CaJES..51D..17W. doi:10.1139/cjes-2013-0175.
• The life of John Tuzo Wilson Archived January 1, 2017, at the Wayback Machine, history pages, Department of Physics, University of Toronto.
• The Tuzo Wilson Lecture, an annual public lecture given at the University of Toronto.
• The J. Tuzo Wilson Professorship Archived July 12, 2020, at the Wayback Machine, a named memorial professorship at the University of Toronto.
• Travel Photographs of J. Tuzo Wilson
• John Tuzo Wilson archival papers held at the University of Toronto Archives and Records Management Services
• Watch Tuzo Wilson in the 1975 educational TV show Planet of man on YouTube