University of Miami geologist Jacqueline Dixon and her colleagues studied the stone celts or axes recovered during excavation of the Miami Circle. One of the celts was found in place inside one of the holes in the bedrock. Spectrographic analysis of the basaltic celt fragments from the site indicates that the Macon, Georgia area is a likely source for this material. This analysis is important since it helped dispel speculation that the stone celts were proof of contact with the Caribbean, Mesoamerica, or northern South America. The sourcing study also helps demonstrate that the Tequesta and their ancestors participated in long-distance exchange networks with other parts of Florida and the Southeast.