Pentti Elias Eskola (8 January 1883 – 6 December 1964) was a

Finnish Finnish may refer to: * Something or someone from, or related to Finland * Culture of Finland * Finnish people or Finns, the primary ethnic group in Finland * Finnish language, the national language of the Finnish people * Finnish cuisine See also ...

geologist A geologist is a scientist who studies the solid, liquid, and gaseous matter that constitutes Earth and other terrestrial planets, as well as the processes that shape them. Geologists usually study geology, earth science, or geophysics, althou ...

who specialised in the petrology of granites and developed the concept of

metamorphic facies A metamorphic facies is a set of mineral assemblages in metamorphic rocks formed under similar pressures and temperatures.Essentials of Geology, 3rd Edition, Stephen Marshak The assemblage is typical of what is formed in conditions corresponding ...

. He won the

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 It was originally made of gold (1831–1845), ...

in 1958, the Vetlesen Prize in 1964, and was given a

state funeral A state funeral is a public funeral ceremony, observing the strict rules of protocol, held to honour people of national significance. State funerals usually include much pomp and ceremony as well as religious overtones and distinctive elements of ...

upon his death. The mineral eskolaite is named in his honor. Eskola was born in Lellainen, the son of a farmer. He graduated from the

University of Helsinki The University of Helsinki ( fi, Helsingin yliopisto, sv, Helsingfors universitet, abbreviated UH) is a public research university located in Helsinki, Finland since 1829, but founded in the city of Turku (in Swedish ''Åbo'') in 1640 as the R ...

in 1906 and received a doctorate in 1914 with a dissertation on the petrology of the Orijärvi Region. Eskola was a student of

Wilhelm Ramsay Wilhelm Ramsay (20 January 1865 – 6 January 1928) was a Finland Swede geologist. He became a member of the Royal Swedish Academy of Sciences in 1914 and in 1915 was accepted into the Royal Physiographic Society in Lund. He coined the terms Fen ...

. He visited Norway and the US in 1920-21 working at the Geophysical Laboratory in Washington, D. C. and with the Geological Survey of Canada during which time he examined eclogites. He became a geologist for the Finnish Survey in 1922 and joined as a professor of geology at Helsinki in 1924 working there until 1954. Eskola's major work on metamorphism was influenced by the work of J.J. Sederholm whose work he read when he was just 23. He began to think of the origin and formation of the granites and gneisses and came up with a method to classify the formation under different pressure and temperature conditions resulting in varying chemical equilibria being achieved. Eskola married in 1914. His wife Mandi Wiiro suffered from a long illness before passing. Their son Matti (1916-1941) predeceased them, as he was killed during World War II on the Russian front and all that was returned to his parents was a purse which contained apple seeds that he collected to plant in their family farm, which Eskola planted in memory of his son. His daughter Päivätär became a chemistry teacher. Eskola also discussed philosophy in a book on world outlook and corresponded with philosophers Rolf Arnkil and Sigfrid Sirenius.

References

1883 births 1964 deaths Finnish geologists Petrologists Wollaston Medal winners Penrose Medal winners Academic personnel of the University of Helsinki Foreign associates of the National Academy of Sciences 20th-century geologists {{Finland-bio-stub