All contributions, whether articles, correspondence or reviews, must be typed in duplicate on one side of the paper, double spaced throughout, with a wide margin on the left of each page and a narrower margin on the right. Any minor corrections should be made neatly in the typescript, leaving the margins clear. The total length of a paper should not in general exeeed 20 pages of the Geological Magazine; preference and priority are given to short papers. Longer papers (between 20 and 40 pages of

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... Geological Magazine) will from time to time be considered, but authors wishing to submit such manuscripts should first request further details. The accuracy of references is the responsibility of authors. References must be double spaced and abbreviated in the form of the World List of Scientific Periodicals 4th Edition as far as possible, e.g.