Born 2 December 1884 in Birmingham, son of Arthur James Cox and his wife Mary. He was educated at Edward VI Grammar School, Birmingham, and then at Birmingham University where he graduated B.Sc. in 1904 and M.Sc. 1905, and subsequently gained the degrees of Ph.D. Strasburg and D.Sc. Birmingham. He was a F.G.S. and was awarded the Lyell Medal of the Geological Society in 1948. He began his career as a lecturer in geology at U.C.W., Aberystwyth in 1909 but went to King's College London the following year. He was a member of H.M. Geological Survey in 1917 but was appointed to the Chair of Geology at U.C.S.W., Cardiff in 1918 where he remained until his retirement in 1949. He worked on the geology of the Pembrokeshire coast and on Cader Idris, extending our knowledge of the volcanoes of the Ordovician Period, but he published most extensively on the geological structures of south Wales. He realised the potential economic importance of geological studies, e.g. research into the conditions of oil and mineral deposits, and his work on the incidence of silicosis was of particular significance. He played a leading role in the development of the National Museum of Wales.
He married Florence Elizabeth Page in 1919. He died at Cardiff, 14 February 1961.
Published date: 2001
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