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I would like to call your attention to the following session at the Fall AGU meeting (8-12 December 2003, San Francisco, California). The session will include presentations on a wide range of topics with the general theme of what we can learn about geological processes from studies of garnet (chemistry, microstructure). The deadline for abstract submission via the web is 4 September 2003, 1400 UT. See the AGU Fall Meeting website for other information about the meeting: http://www.agu.org/meetings/fm03/. Please contact one of the conveners listed below if you have any questions about the garnet session, and please pass this email along to interested colleagues and students. TimesMany facets of garnet: Recorders of crust and mantle dynamics Conveners TimesDonna L. Whitney, Geology & Geophysics, Univ of Minnesota, Minneapolis, MN 55455 USA Tel 612-626-7582; Fax: 612-625-3819; E-mail: 0000,0000,00FF[log in to unmask] Derek Vance, Royal Holloway, University of London, Egham. Surrey TW20 OEX UK Tel 44 1784 443615; Fax 44 1784 471780; E-mail: 0000,0000,00FF[log in to unmask] David Hirsch, Department of Geology, Western Washington University, Bellingham WA 98225 USA Tel 1-360-650-2166; E-mail: 0000,0000,00FF[log in to unmask] Richard Spiess, Dipartimento di Mineralogia e Petrologia, Corso Garibaldi 37, 35137 Padova ITALY Tel 39-049-8272016; Fax 39-049-8272010; E-mail: 0000,0000,00FF[log in to unmask] Session Description The chemical and physical properties of garnets have long been central to petrologic and structural studies of the continental crust and mantle because garnets may record the pressure, temperature, strain, and fluid histories of rocks through time. In recent years, new techniques have improved our ability to probe the chemical composition, isotopic systematics, and microstructures of garnets, and therefore to better understand metamorphic and magmatic processes. Methods and applications include Symbol TimesElemental and isotopic studies of major, trace, and volatile components in garnets and inclusions in garnets to understand the evolution of the crust and mantle, the rates and mechanisms of high-T geologic processes (heating, burial/decompression, mineral growth, deformation), and the record of fluid-rock interactions in the Earth through time. Symbol TimesMicrostructural studies to document brittle and ductile processes in the continental crust and mantle. We welcome contributions that use garnet-based studies to understand petrologic and tectonic processes. In particular, we encourage papers from investigators using high-resolution methods to characterize and interpret the composition and microstructures of garnets in a petrologic or structural context.