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By: Howarth, Michael Kingsley - Smith, Andrew B. - Morris, N J - Kennedy, W. J. (William James) - Gale, A. S. - Taylor, Paul D. - Owen, Ellis F - Skelton, Peter WilliamType: ArticleIn: Bulletin of the Natural History Museum. Geology seriesVolume: 51Series:Issue:Date: 1995Page Range: 89--305Publication Info: Andover, Intercept,Subjects: