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About this PDF file: This new digital representation of the original work has been recomposed from XML files created from the original paper book, not from the original typesetting files. Page breaks are true to the original; line lengths, word breaks, heading styles, and other typesetting-specific formatting, however, cannot be retained, and some typographic errors may have been accidentally inserted. Please use the print version of this publication as the authoritative version for attribution. i COLLOQUIUM ON GEOLOGY, MINERALOGY, AND HUMAN WELFARE NATIONAL ACADEMY OF SCIENCES WASHINGTON, D.C. 1999 About this PDF file: This new digital representation of the original work has been recomposed from XML files created from the original paper book, not from the original typesetting files. Page breaks are true to the original; line lengths, word breaks, heading styles, and other typesetting-specific formatting, however, cannot be retained, and some typographic errors may have been accidentally inserted. Please use the print version of this publication as the authoritative version for attribution. ii NATIONAL ACADEMY OF SCIENCES Colloquium Series In 1991, the Nationfal Academy of Sciences inaugurated a series of scientific colloquia, five or six of which are scheduled each year under the guidance of the NAS Council's Committee on Scientific Programs. Each colloquium addresses a scientific topic of broad and topical interest, cutting across two or more of the traditional disciplines. Typically two days long, colloquia are international in scope and bring together leading scientists in the field. Papers from colloquia are published in the Proceedings of the National Academy of Sciences (PNAS). About this PDF file: This new digital representation of the original work has been recomposed from XML files created from the original paper book, not from the original typesetting files. Page breaks are true to the original; line lengths, word breaks, heading styles, and other typesetting-specific formatting, however, cannot be retained, and some typographic errors may have been accidentally inserted. Please use the print version of this publication as the authoritative version for attribution. GEOLOGY, MINERALOGY, AND HUMAN WELFARE Geology, Mineralogy, and Human Welfare A Colloquium sponsored by the National Academy of Sciences November 8-9, 1998 PROGRAM Sunday, November 8, 1998 AGRICULTURAL MINERALOGY/SOILS, SURFACES Garrison Sposito, University of California, Berkeley, Surface geochemistry of the clay minerals 9:40am 10:20am Paul M. Bertsch, University of Georgia/SREL, Characterization of complex mineral assemblages: implications for contaminant transport and environmental remediation 11:20am Samuel J. Traina, Stanford University, Contaminant bioavailability in soils, sediments and aquatic environments Gordon E. Brown, Jr., Stanford University, Mineral surfaces and bioavailability of heavy metals: A molecular-scale perspective 12:00pm AEROSOLS AND CLIMATE Joseph M. Prospero, University of Miami RSMAS, Long-range transport of mineral dust in the global atmosphere: Impact of African 2:00pm dust on the environment of the southeastern United States 2:40pm Peter R. Buseck, Arizona State University, Airborne minerals and related aerosol particles: Effects on climate and the environment OCEANS AND BIOMINERALOGY Miriam Kastner, Scripps Institution of Oceanography, Oceanic minerals and rocks, their origin, occurrence, and economic significance 3:40pm 4:20pm Keith A. Kvenvolden, U.S. Geological Survey, Potential effects of gas hydrates on human welfare Jillian F. Banfield, University of Wisconsin, Madison, Biological impact on mineral dissolution - application of the lichen model to 5:00pm understanding mineral weathering in rhizosphere iii About this PDF file: Thi