Mounting evidence suggests that the Archaic Southeast shell mound builders had large‐scale trade networks and engaged in social aggregations. Here, incremental ⁸⁷Sr/⁸⁶Sr values were measured by laser ablation‐inductively coupled plasma‐mass spectrometry (LA‐ICP‐MS) in third molar enamel samples of 11 individuals interred in the Middle Archaic Harris Creek shell burial mound in St. John's River Valley (SJRV), Florida. Results reveal that SJRV residents engaged in short‐term, long‐distance mobility up to the Piedmont margin and excursions into coastal areas, consistent with direct trading and social gatherings. Two individuals are interpreted as migrants from central Tennessee, suggesting a link to the Ohio River Valley shell mound builders.

中文翻译：

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从皮埃蒙特到海岸：LA-ICP-MS 87Sr / 86Sr证明了美国东南部的短期，远距离迁移

越来越多的证据表明，古老的东南贝壳丘堆建造者拥有大规模的贸易网络​​，并且参与了社会聚集。在这里，通过激光烧蚀-电感耦合等离子体质谱法（LA-ICP-MS）在圣约翰河中部古哈里斯哈里斯克里克贝冢埋葬的11个人的第三磨牙珐琅质样品中测量了增量的⁸⁷ Sr / ⁸⁶ Sr值。佛罗里达河谷（SJRV）。结果表明，SJRV居民从事到皮埃蒙特边缘的短距离，长距离流动，以及到沿海地区的游览，这与直接交易和社交聚会保持一致。有两个人被解释为来自田纳西州中部的移民，这暗示了与俄亥俄河谷贝壳丘建造者的联系。