SHARK TOOTH EFFIGY
The most common type of arrow point found on the Cahokia Mounds site are the triangular Madison points. Madison points were rarely serrated. In fact, most of the serrated examples were discovered in caches during the excavation of Mound 72. The bases of these serrated points are usually straight and even sometimes convex. In rare cases, examples have been found, like the one pictured above, that seem to be shaped like a shark tooth. This one is serrated and it has a very deep concave base.