This book presents the recommendations of the International Union of Geological Sciences Subcommittee on the Systematics of Igneous Rocks. This second edition contains the same essentials of the QAPF and TAS classification systems as used in the 1988 first edition, with minor corrections and updates. There are changes to the alkaline and related rocks, with alterations to the classification of the lamproites, lamprophyres and kimberlites, and of the ‘high-Mg’ volcanic rocks. In the glossary an extra 51 rock terms have been added, bringing the total to 1637 entries, of which 316 are recommended (and printed in bold capitals), 312 are...

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