 This corresponds to the beginning of the Caloosahatchee IIB period, marked by changes in ceramics.The onset of the Medieval Warm Period brought a rapid return of sea level in Pine Island Sound to former levels, and Pineland was reoccupied in the 10th century.Starting in the 10th century the people of Pineland constructed linear mounds in groups, with the mounds oriented perpendicular to the shoreline, in contrast to the earlier middens parallel to the shoreline.