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Sir Frederick Henry Stewart, 1916–2001

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Born in Aberdeen in 1916, Sir Frederick Stewart (‘Fred’) died in Oban on the 9^th of December 2001. After schooling at Fettes College and Robert Gordon’s College, he read Geology at Aberdeen University. Postgraduate research at Cambridge on the petrology of the Belhelvie gabbros, Aberdeenshire, led to his PhD in 1941. Subsequently he was employed as a mineralogist with ICI research laboratories at Billingham-on-Tees. There, instructed to examine rock cores after an unsuccessful attempt to drill for oil at Eskdale, Yorkshire, he found mineralogical fascination in the Permian evaporites. This led to the identification of the first significant quantities of K-bearing chlorides in the UK, a discovery of strategic importance in wartime Britain. Appointed Lecturer in Geology at Durham University in 1943, he went on to publish a series of papers on the English Permian evaporites. The contrasts and parallels that he recognized between the progressive crystallization of cooling basaltic magma and evaporating seawater provided considerable . . . [Full Text of this Article]