研究人员通过化学分析和显微镜检查，确认了坦帕湾出土的58件陶器碎片由来自密西西比腹地的移民工匠制造1。这一发现解决了困扰学术界逾一个世纪的谜团。这些工匠迁移到坦帕湾后，用本地黏土制作陶器，但采用密西西比传统技术1。
装饰陶器和普通陶器在制作工艺和成分上存在明显差异1。80%的装饰陶器中含有grog（陶片诱导剂），而普通陶器中未发现这一物质1。研究人员还在陶片中发现了云母矿物，这种矿物在佛罗里达北部普遍但在半岛佛罗里达罕见1，进一步印证了其北方来源。特别值得注意的是，研究发现了多代grog现象，即grog中包含更古老的grog碎片1，表明工匠们将来自故乡的古老陶片碎末混入新陶器中，形成了跨越多代的文物链接1。装饰陶器采用盘筑法制作，而普通陶器采用模制法1。该研究已发表在《美国古物》期刊1。
Researchers from the Florida Museum of Natural History have resolved a longstanding archaeological puzzle by tracing pottery fragments discovered in Tampa Bay to craftspeople who migrated from the Mississippi interior. 1 Through chemical analysis and microscopic examination of 58 pottery shards unearthed in the region, scientists determined that these artisans relocated to Tampa Bay and produced ceramics using locally sourced clay while maintaining their ancestral Mississippi manufacturing techniques. 1
A key discovery involved the presence of grog—crushed ceramic material intentionally mixed into new pottery—found in 80 percent of decorative vessels but absent from utilitarian wares. 1 Additionally, mica minerals detected in the pottery fragments are commonplace in northern Florida but rare in the peninsula, further confirming the northern origin of the craftspeople. 1 The research revealed a multi-generational pattern in which grog itself contained even older ceramic fragments, creating a physical chain linking artifacts across centuries of pottery production. 1 Decorative pieces were crafted using the coil-building method, while utilitarian pottery was produced through mold-casting techniques. 1 The nearest Mississippi mound site to the Tallahassee Hills region, where these migrants likely originated, lies approximately 200 miles from Tampa Bay. 1
The findings were published in American Antiquity. 1
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