 1970–1971 he was Royal Society Leverhulme Visiting Professor of Geology at the Haile Selassie University, Addis Ababa, Ethiopia.He formally retired in 1975 but was research fellow at the Open University from 1977 until his death and remained active in field geology.His achievements were recognised by the award of the Silver Medal of the Liverpool Geological Society (1957) and the Murchison Medal of the Geological Society of London (1970), and his election to the Fellowship of the Royal Society (1971).