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    Pre-Palaeozoic basement of the Scottish Midland Valley

    THE tuffs and agglomerates associated with Carboniferous volcanism within the Scottish Midland Valley comprise predominantly basic volcanic and unmetamorphosed sedimentary fragments. For the most part, the for...

    B. G. J. UPTON, P. ASPEN, A. GRAHAM, N. A. CHAPMAN in Nature (1976)