Peter John Wyllie (born 8 February 1930, in

London London is the Capital city, capital and List of urban areas in the United Kingdom, largest city of both England and the United Kingdom, with a population of in . London metropolitan area, Its wider metropolitan area is the largest in Wester ...

, England) is a British

petrologist Petrology () is the branch of geology that studies rocks, their mineralogy, composition, texture, structure and the conditions under which they form. Petrology has three subdivisions: igneous, metamorphic, and sedimentary petrology. Igneous an ...

and academic. He was Professor of Geology at the

California Institute of Technology The California Institute of Technology (branded as Caltech) is a private research university in Pasadena, California, United States. The university is responsible for many modern scientific advancements and is among a small group of institutes ...

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

University of St Andrews The University of St Andrews (, ; abbreviated as St And in post-nominals) is a public university in St Andrews, Scotland. It is the List of oldest universities in continuous operation, oldest of the four ancient universities of Scotland and, f ...

(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 Pennsyl ...

(1958–59 and 1961–66), the

University of Leeds The University of Leeds is a public research university in Leeds, West Yorkshire, England. It was established in 1874 as the Yorkshire College of Science. In 1884, it merged with the Leeds School of Medicine (established 1831) and was renamed Y ...

(1959–61), and the

University of Chicago The University of Chicago (UChicago, Chicago, or UChi) is a Private university, private research university in Chicago, Illinois, United States. Its main campus is in the Hyde Park, Chicago, Hyde Park neighborhood on Chicago's South Side, Chic ...

(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 (sometimes colloquially but incorrectly referred to as ''lava'') is found beneath the surface of the Earth, and evidence of magmatism has also ...

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 (, ) is the scientific theory that the Earth's lithosphere comprises a number of large tectonic plates, which have been slowly moving since 3–4 billion years ago. The model builds on the concept of , an idea developed durin ...

. 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 is a general knowledge, general-knowledge English-language encyclopaedia. It has been published by Encyclopædia Britannica, Inc. since 1768, although the company has changed ownership seven times. The 2010 version of the 15th edition, ...

'', 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 or ...

''. Wyllie was President of the

International Union of Geodesy and Geophysics The International Union of Geodesy and Geophysics (IUGG; , UGGI) is an international non-governmental organization dedicated to the scientific study of Earth and its space environment using geophysical and geodetic techniques. The IUGG is a me ...

(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, NGO, 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 ...

, USA, 1981 *

Wollaston Medal The Wollaston Medal is a scientific award for geology and the highest award granted by the Geological Society of London, the oldest geological society in the world. The medal is named after William Hyde Wollaston, and was first awarded in 1831. I ...

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 Fellows 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

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