John Guest

John Edward Guest (6 December 1938 – 19 May 2012), was a British volcanologist and planetary scientist. Education and family Guest was born in London, England). He studied at University College London (UCL) and he graduated there in 1962. He and Mary Guest, his wife, had two sons, Ben and James Career Guest remained as an employee of his alma mater for the remainder of his career. He worked on his PhD under Sydney Ewart Hollingworth on the subject of tertiary ignimbrites in the Chilean Andes, where Hollingworth had been mapping the geology. Planetary geology and physical volcanology were developed at UCL under his auspices. He did research on a number of volcanoes around the World, but most notably Mount Etna in Sicily. He was the leader of the United Kingdom's efforts in a long-term collaboration with Italy to study the evolution of Mount Etna and, for the first time in over 100 years, make a geological map of it.