Douglas James Shearman, geologist: born Isleworth, Middlesex 2 July 1918; Assistant Lecturer, Imperial College, London 1949-51, Lecturer 1951-63, Senior Lecturer 1963-71, Reader 1971-78, Professor of Sedimentology 1978-83 (Emeritus); married 1949 Maureen Pugsley (two sons, one daughter); died Cassington, Oxfordshire 12 May 2003.
During his long career as a geologist at Imperial College, London, Douglas Shearman was a charismatic, enthusiastic, dedicated and unorthodox teacher and research worker. His lectures and seminars, illustrated by his own elegant and explicit diagrams, were stimulating and exciting. His view, now deeply unfashionable, was that it was his responsibility to show students how to think and not to fill their minds with endless details. Staff and students alike regarded him with admiration and affection, even those staff whose forms he failed to fill.
When Shearman was presented in 1984 with the Lyell Medal of the Geological Society by the President, Professor Janet Watson, she summed up his research genius:
Two aspects of your scientific personality stand out. One is your genuine delight in a new idea and the way in which such an idea tends to dominate your thoughts to the exclusion of all else - the second, your ability to look at some very simple phenomenon which others have taken for granted and find something new in it.
After a primary education in Hounslow, west London, Shearman moved with his parents to Southend, where he completed his school education and, importantly, spent many hours exploring the Thames estuary and Essex marshes. After school he joined the Post Office as a trainee engineer. However his career was short-lived because in 1939 he was recruited into the Royal Navy. During his basic training in Dover he met in the Naafi Tom Pain, a young soldier who was examining a fossil from the chalk using a hand lens. Discussions over tea and doughnuts set Shearman on a career in geology.
After the Second World War, much of which was spent as a wireless operator on a minesweeper in the North Atlantic, keeping the lanes clear for the Russian convoys, chance played another trick. Shearman went to live in Chelsea and heard that at Chelsea Polytechnic there was a course in geology. He enrolled in 1946 and came under the influence of William Fleet, a remarkable and inspiring geologist who taught all the courses and ran all the field excursions. Shearman was awarded a first class degree and appointed Assistant Lecturer at Imperial College by H.H. Read.
Read, who recognised that the study of sedimentary rocks was becoming increasingly important, called Shearman in and said, "We need someone to work on and teach about sedimentary rocks, and I have chosen you." So Shearman became leader of the Sedimentary Subsection (initially of one), a post he retained until he retired in 1983.
Doug Shearman's research interests were very varied. They frequently resulted from a new look at an old problem or the connecting of two apparently unconnected phenomena. A big advantage he had was his ability to remember practically everything he read or saw. He would, for example, refer to a paper published in an obscure journal some 30 years earlier which was absolutely relevant. The downside of his ability was his tendency not to label any samples he collected or any photographs he took until they were required for publication.
During the late 1950s and early 1960s two major areas of research developed in the Sedimentology group under Shearman's direction. The first was a study of the limestones and dolomites found in the French Jura. Here Brian Evamy and Shearman developed micro-chemical staining techniques which helped unlock the cementation history of limestones, and Shearman, with other students, used trace element and other methods to elucidate the processes of dolomitisation and dedolomitisation of limestones. These techniques have since been used worldwide. The second area of research was on the inter-tidal sediments of the Wash on the east coast which was initiated by Graham Evans.
When the study of modern inter-tidal/supra-tidal sediment deposition was transferred to the arid environment of the Trucial Coast of the Arabian Gulf (now the United Arab Emirates), Shearman, Evans and their co-researchers defined what was to be called the Sabkha environment, and recorded the first example of Recent anhydrite. This study, together with one Shearman made in Baja California on inter-tidal laminated halite (salt) deposits, allowed him, working with John Fuller in Canada and others around the world, to re-interpret ancient evaporite sequences with great benefit to the oil industry.
In recognition of his work in sedimentology, Shearman was awarded a DSc and personal Chair in Sedimentology (the first in the country).