The shell, called a carapace, from a loggerhead sea turtle was recovered from the northeastern portion of the Miami Circle. The turtle carapace seems to have been buried on purpose and may have been a platter or similar artifact. Similar artifacts are not recorded in the literature, though if the carapace was a platter it may be similar to buried shell and ceramic vessels found in southern Florida sites. Measurements of the carapace indicate that it is not an adult, but rather a sub-adult. Charcoal found with the carapace was radiocarbon dated to around A.D. 1330-1650.