The Weeden Island culture 400–1000. The Weeden Island culture is believed to have emerged from the Hopewell culture-based Swift Creek cultural tradition of northwest Florida during the Middle Woodland Period (c. 200 - 500) in the lower Chattahoochee-Apalachicola river drainage, persisting in some areas until the end of the Woodland period c. 1200 CE. Weeden Island sites have been found from Mobile Bay to south of Tampa Bay, extending as far north as lower-central Georgia. Concentrated around lakes Lake Miccosukee and Lake Iamonia. Adoption of maize agriculture. Pottery was Weeden Island plain ware and Swift Creek Complicated Stamped.