<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; "><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" color="#000000">We would like to draw your attention to session S02 of the next AGU Latin American Joint Assembly, Acapulco, Mexico, 22-25 May 2007.</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><BR class="khtml-block-placeholder"></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" color="#000000">S02 Upper Mantle Structure and Geodynamics of the South American Plate</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><BR class="khtml-block-placeholder"></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" color="#000000">South America is unique in having the longest continuously-active subduction of oceanic lithosphere beneath continental lithosphere available for study. The long history of subduction along western South America implies its subcontinental mantle lithosphere and mantle wedge have been affected by widely varying convergence conditions and slab morphology. Thus, observations of crustal and upper mantle structure of South America, and geodynamic modeling of this subduction history and attendant effects are important avenues to better understanding the dynamics of the plate. Recent seismologic field experiments and new geodynamic analysis tools are refining our perception of South America's upper mantle structure and composition and their relationships to its plate motion history and structural evolution. We welcome contributions regarding all aspects of South American crustal and upper mantle structure and geodynamics, including those relevant to the nature of the strong low-velocity anomalies in the sub-Andean asthenospheric wedge; relationships between asthenospheric wedge development and Andean deformation; structure and composition of South America's ancient cratons; upper mantle seismic anisotropy, petrofabrics, and geodynamic history; mantle temperature; seismic attenuation and rheology; the geometry and extent of the subducted Nazca plate; slab morphology and fate; and Caribbean-South America interaction.</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><BR class="khtml-block-placeholder"></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" color="#000000">Conveners: Marcelo Assumpcao (Univ. Sao Paulo, Brazil), Suzan van der Lee (Northwestern Univ., USA), Ray Russo (Florida Univ., USA)</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" color="#000000">Important date: Abstract deadline March 1st, 2007</FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Helvetica; min-height: 14px; "><FONT class="Apple-style-span" color="#000000"><BR></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" color="#000000">More info at</FONT><FONT class="Apple-style-span" color="#006311"> </FONT><A href="http://www.agu.org/meetings/ja07/"><FONT class="Apple-style-span" color="#0000F0">http://www.agu.org/meetings/ja07/</FONT></A></DIV></BODY></HTML>