Abstract

The Iva site contained a rare effigy mound and Middle Mississippian (Ramey horizon) component within the Late Woodland Lewis phase territory of the Upper Mississippi River valley. Salvage excavations in 2002–2003 recovered fragments of numerous Angelo Punctated, Powell Plain, and Ramey Incised vessels, including examples of Angelo and Ramey in direct association. Petrographic analysis was conducted on seven grit-tempered and six shell-tempered vessels, eight of which are stylistically Mississippian. The results indicate that four of eight Mississippian vessels were likely manufactured in the American Bottom, with the other half being local imitations of Mississippian styles. These data are compared to contemporaneous Ramey horizon components in the Driftless Area of Cahokia's northern hinterland.

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