Feature 71 is located in the northwestern quadrant of the Miami Circle, and like most of the other basin features in this quadrant, is comprised of two joined basins. The walls of both basins are nearly vertical and have vertical cut marks. Five smaller holes are present in the bottom of the feature. A large number of limestone cobbles, many cemented together, are wedged into both basins. The excavators note one “square gap” formed by the cobbles and suggest this may have held a wooden post. The midden contained animal bone, some marine shell, sand-tempered plain ceramics, and fragments of concretion and limestone.