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Geological Society, London, Special Publications; 1983; v. 11; p. 47-58;
DOI: 10.1144/GSL.SP.1983.011.01.07
© 1983 Geological Society of London

Kaolinites, Laterites and Bauxites

The Ayrshire Bauxitic Clay: an allochthonous deposit?

S. K. Monro

Institute of Geological Sciences, Murchison House, West Mains Road, Edinburgh EH9 3LA

F. C. Loughnan & M. C. Walker

School of Applied Geology, University of New South Wales, P.O. Box 1, Kensington, New South Wales 2033, Australia

Since the original study of the Ayrshire Bauxitic Clay by Wilson in 1922, new sections have been examined in both quarries and boreholes. It has also been suggested that the Ayrshire Bauxitic Clay is, in effect, a typical flint clay comparable with those of North America, South Africa, Australia and elsewhere. A re-examination of the outcrop and borehole evidence has been undertaken with a detailed chemical, mineralogical and petrographical study of the core of a bore that penetrated both the Ayrshire Bauxitic Clay and associated altered basalts. The study presents a body of evidence which suggests that, in part at least, the Ayrshire Bauxitic Clay is allochthonous in origin.