buat sobat-sobat yang ingin memperdalam ilmu batuan beku nya, nih ane punya ebook IGNEOUS ROCKS: A CLASSIFICATION AND GLOSSARY OF TERMS. penulis-penulisnya R.W. LE MAITRE (EDITOR), A. STRECKEISEN, B. ZANETTIN, M.J. LE BAS, B. BONIN, P. BATEMAN, G. BELLIENI, A. DUDEK, S. EFREMOVA, J. KELLER, J. LAMEYRE, P.A. SABINE, R. SCHMID, H. SØRENSEN, A.R. WOOLLEY.
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This book is the result of over three decades of deliberation by The International Union of Geological Sciences (IUGS) Subcommission on the Systematics of Igneous Rocks.
The Subcommission was originally set up after the International Geological Congress meeting in Prague in 1968 as the result of an earlier investigation into the problems of igneous rock classification that had been undertaken by Professor Albert Streckeisen from 1958 to 1967 (Streckeisen, 1967). He was appointed the first Chairman of the Subcommission, a position he held from 1969 to 1980 and was followed by Bruno Zanettin (1980– 1984, Italy), Mike Le Bas (1984–2001, UK) and Bernard Bonin (2001–, France). The secretaries of the Subcommission have been V. Trommsdorff (1970–75, Switzerland), Rolf Schmid (1975–80, Switzerland), Giuliano Bellieni (1980–84, Italy) and Alan Woolley (1984–2001, UK).
During this time the Subcommission has held official meetings in Bern (1972), Montreal (1972), Grenoble (1975), Sydney (1976), Prague (1977), Padova (1979), Paris (1980), Cambridge (1981), Granada (1983), Moscow (1984), London (1985), Freiburg im Breisgau (1986), Copenhagen (1988), Washington D.C. (1989), Southampton (1996) and Prague (1999).
For these meetings the secretaries distributed 52 circulars to the members of the Subcommission containing a total of 164 contributions from petrologists throughout the world. All of these contributions have now been deposited in the Department of Mineralogy at the Natural History Museum in London and in the Library of the Geological Museum, University of Copenhagen.
Records of the Subcommission also indicate that 456 people from 52 countries participated in the formulation of the recommendations in various ways. Of these, 52 were official members of the Subcommission representing their countries at various times; 201 were members of various working groups that were periodically set up to deal with specific problems; 176 corresponded with the Subcommission; and 27 attended meetings as guests. These people are listed in Appendix A.
All the recommendations of the Subcommission were published as individual papers as soon as they were agreed upon. However, it was decided, at the 1986 meeting in Freiburg im Breisgau, to present all the results under one cover to make access easier, even though parts of the classification were still unresolved. This resulted in the first edition of this book being published (Le Maitre et al., 1989).
Although the concept of a glossary was mentioned by the Subcommission in 1976, it was not until late 1986 that the work on creating it was started in earnest. The original idea for the glossary was that it should only include those names that were recommended for use by the Subcommission. However, it soon became obvious that for it to be really useful it should be as complete as possible.