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Please consider submitting an abstract to: Session 222: Geological Society of America, Annual Meeting, Denver Colorado: *_Proterozoic Accretion of the North American Continent – United Plates of America Revisited_* It has been nearly three decades since Paul Hoffman’s (1988) influential United Plates of America paper. The two-stage process involving first amalgamation of Archean blocks and second, continental growth by accretionary orogenesis is largely intact. However, there have been major new data sets and new insights concerning the timing, tectonic setting, and nature of crustal materials both within the Laurentian core and at the margins. The goal of this session is to bring together researchers from across the continent (and from once-adjacent continents) to present and discuss new data and to ultimately work toward a new image for the composite Laurentian tectonic fabric and history during its critical period of growth. Submissions concerning the accretion of the Canadian Shield and the subsequent accretionary orogens are encouraged. We anticipate oral and poster sessions. Mike Williams Karl Karlstrom David Corrigan Jeffrey Amato Deanne van Rooyen -- Michael L. Williams Department of Geosciences 611 NOrth Pleasant St. University of Massachusetts Amherst, MA, 01003 413-545-0745