Peter John Wyllie (born 8 February 1930, in

London London is the capital and largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary down to the North Sea, and has been a majo ...

, England) is a British

petrologist Petrology () is the branch of geology that studies rocks and the conditions under which they form. Petrology has three subdivisions: igneous, metamorphic, and sedimentary petrology. Igneous and metamorphic petrology are commonly taught together ...

and academic. He was Professor of Geology at the

California Institute of Technology The California Institute of Technology (branded as Caltech or CIT)The university itself only spells its short form as "Caltech"; the institution considers other spellings such a"Cal Tech" and "CalTech" incorrect. The institute is also occasional ...

from 1983 until his retirement in 1999. Prior to this, he held positions at the

University of St Andrews (Aien aristeuein) , motto_lang = grc , mottoeng = Ever to ExcelorEver to be the Best , established = , type = Public research university Ancient university , endowment ...

(1955–56),

Pennsylvania State University The Pennsylvania State University (Penn State or PSU) is a Public university, public Commonwealth System of Higher Education, state-related Land-grant university, land-grant research university with campuses and facilities throughout Pennsylvan ...

(1958–59 and 1961–66), the

University of Leeds , mottoeng = And knowledge will be increased , established = 1831 – Leeds School of Medicine1874 – Yorkshire College of Science1884 - Yorkshire College1887 – affiliated to the federal Victoria University1904 – University of Leeds , ...

(1959–61), and the

University of Chicago The University of Chicago (UChicago, Chicago, U of C, or UChi) is a private research university in Chicago, Illinois. Its main campus is located in Chicago's Hyde Park neighborhood. The University of Chicago is consistently ranked among the b ...

(1965–83). He is well known for his many contributions to the understanding of

magmatism Magmatism is the emplacement of magma within and at the surface of the outer layers of a terrestrial planet, which solidifies as igneous rocks. It does so through magmatic activity or igneous activity, the production, intrusion and extrusion of ...

, particularly through his work on the experimental petrology of

magmas Magma () is the molten or semi-molten natural material from which all igneous rocks are formed. Magma is found beneath the surface of the Earth, and evidence of magmatism has also been discovered on other terrestrial planets and some natural sa ...

and volatiles. In the early 1970s, Wyllie wrote two widely used textbooks; ''The Dynamic Earth'' (1971) and ''The Way the Earth Works'' (1976) which integrated the new understanding of magmatism and

plate tectonics Plate tectonics (from the la, label=Late Latin, tectonicus, from the grc, τεκτονικός, lit=pertaining to building) is the generally accepted scientific theory that considers the Earth's lithosphere to comprise a number of large ...

. He is also famous for his contributions to the coverage of

earth science Earth science or geoscience includes all fields of natural science related to the planet Earth. This is a branch of science dealing with the physical, chemical, and biological complex constitutions and synergistic linkages of Earth's four spheres ...

s in the ''

Encyclopædia Britannica The (Latin for "British Encyclopædia") is a general knowledge English-language encyclopaedia. It is published by Encyclopædia Britannica, Inc.; the company has existed since the 18th century, although it has changed ownership various time ...

'', particularly his outline of the field in Part Two of the ''

Propædia The one-volume ''Propædia'' is the first of three parts of the 15th edition of ''Encyclopædia Britannica'', intended as a compendium and topical organization of the 12-volume ''Micropædia'' and the 17-volume ''Macropædia,'' which are organi ...

''. Wyllie was President of the

International Union of Geodesy and Geophysics The International Union of Geodesy and Geophysics (IUGG; french: Union géodésique et géophysique internationale, UGGI) is an international non-governmental organization dedicated to the scientific study of Earth and its space environment usi ...

(IUGG) from 1995 to 1999.

Awards and honours

Polar Medal The Polar Medal is a medal awarded by the Sovereign of the United Kingdom to individuals who have outstanding achievements in the field of polar research, and particularly for those who have worked over extended periods in harsh climates. It w ...

, 1954 *

National Academy of Sciences The National Academy of Sciences (NAS) is a United States nonprofit, non-governmental organization. NAS is part of the National Academies of Sciences, Engineering, and Medicine, along with the National Academy of Engineering (NAE) and the Nati ...

, USA, 1981 *

Wollaston Medal The Wollaston Medal is a scientific award for geology, the highest award granted by the Geological Society of London. The medal is named after William Hyde Wollaston, and was first awarded in 1831. It was originally made of gold (1831–1845), t ...

Geological Society of London The Geological Society of London, known commonly as the Geological Society, is a learned society based in the United Kingdom. It is the oldest national geological society in the world and the largest in Europe with more than 12,000 Fellows. Fe ...

, 1982 *

Fellow of the Royal Society Fellowship of the Royal Society (FRS, ForMemRS and HonFRS) is an award granted by the judges of the Royal Society of London to individuals who have made a "substantial contribution to the improvement of natural science, natural knowledge, incl ...

, London, 1984 *

Roebling Medal The Roebling Medal is the highest award of the Mineralogical Society of America for scientific eminence as represented primarily by scientific publication of outstanding original research in mineralogy. The award is named for Colonel Washington A ...

Mineralogical Society of America The Mineralogical Society of America (MSA) is a scientific membership organization. MSA was founded in 1919 for the advancement of mineralogy, crystallography, geochemistry, and petrology, and promotion of their uses in other sciences, industry, ...

, 2001

References

External links

* British geologists Petrologists 1930 births Scientists from London Alumni of the University of St Andrews University of Chicago faculty University of Pennsylvania faculty British emigrants to the United States Wollaston Medal winners California Institute of Technology faculty Living people Fellows of the Royal Society Foreign associates of the National Academy of Sciences Foreign Members of the USSR Academy of Sciences Foreign Members of the Russian Academy of Sciences Foreign members of the Chinese Academy of Sciences Foreign Fellows of the Indian National Science Academy Recipients of the Polar Medal Presidents of the International Union of Geodesy and Geophysics Presidents of the International Mineralogical Association {{geologist-stub