The origins of engraved marine shell cups, copper repoussé plates, and ritual centers: disentangling early Cahokia symbolism from post–AD 1200 SECC iconography

ABSTRACT The development of Southeastern Ceremonial Complex (SECC) iconography has been posited to have had its origins in pre–AD 1200 Greater Cahokia. The recovery of fragments of an engraved shell cup, a few engraved pottery sherds, and copper residue from Mound 34 at Cahokia as well as two regional rock-art sites are said to confirm that the early Braden art style had a Cahokian heritage. Furthermore, on this basis, the origin, production, and distribution of engraved shell cups and copper repoussé plates have been attributed to Cahokian artisans. Here the archaeological context and chronology of this evidence is reexamined and found to be problematic—it does not support Cahokia origins for engraved shell cups and copper repoussé plates. The small amount of early Braden materials attributed to Cahokia are better explained as byproducts of the demonstrable presence of early Caddo immigrants and influences in the American Bottom. The skewed distribution and early chronology of Mississippian engraved shell cups and copper repoussé plates confirm they are likely products of Spiro-influenced ritual practitioners. The production and accumulation of such ritual paraphernalia at Spiro can most reasonably be attributed to the site's rise as a sacred place and central locus for regional pilgrimages.