Dear colleague! As a convenor of the Special Symposium C-Global Changes and Future Environment, session C-5 "Anthropogenic Impact on Weathering Processes", which will be organized in course of the 31st International Geological Congress in Rio de Janeiro from August 6 to 17, 2000, I would like to invite you to contribute a paper relating to the topic of the above session. All papers (excluding seven invited keynote speakers) have to be presented as posters. The deadline for abstracts (max. 250 words, in English) is September 1st, 1999. Please send your abstract to: 31st International Geological Congress Scientific Program Committee Av. Pasteur, 404 - Casa Brazil 2000 Urca - Rio de Janeiro - RJ - Brazil - Cep 22.290-240 - and PLEASE inform also me about your submitted abstract. For details concerning the presentations please see the Web site http://www.31igc.org Please distribute this call for papers in your department and forward it to any of your colleagues who might be interested. (Usual apologies for possible cross-posting). With best regards Dr. Petr Sulovsky leader of IGCP 405 "Anthropogenic Impact on Weathering Processes" (1996 - 2000) Dept. of Mineralogy, Petrology and Geochemistry Faculty of Science, Masaryk University Kotlarska 2 611 37 Brno Czech Republic phone +420-541129231 fax +420-541211214 http://www.sci.muni.cz/~sulovsky/index.html http://www.sci.muni.cz/~sulovsky/mineralogie.html http://www.sci.muni.cz/~sulovsky/IGCP405.html http://www.sci.muni.cz/~sulovsky/15clays.html %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%