| Description | Two working files relating to collaborative but unpublished work with Keith O'Nions, comprising:
File 1, entitled 'Geochemical ?stirring' with inserted note from McKenzie "muddled notes on conversations with Keith O'Nions in the 1980s when we were trying to understand why the geochemical evolution of the earth changed at c.2 Ga ago. We got nowhere 8/13." The file contains: typescript copy of paper "Eddies and their transports" by Peter B Rhines, Christ's College Cambridge, October 1979; manuscript notes, plots and equations, [1980]; copies, offprints or cuttings of published academic papers by others, plus bibliographic references, 1979-1980.
File 2, entitled 'Earth's evolution with Keith. MORB variations with Frank', which McKenzie described as being on the subject of 'Craton formation with Keith O'Nions never published'. The file contains: manuscript notes equations and computer data sets, [1979-1980]; copies of published academic papers, two by Keith O'Nions, on isotopic studies of granite and crustal evolution, 1980-1981. |