CAHOKIA POINT: A side-notched, triangular arrow point with straight sides to slightly concave basal edges. A few have slightly convex basal edges. There may be additional side notches on the blade, usually just above the primary side notches, or it may be serrated. Points with two or three notches are the most common. The Cahokia point was named by Edward G. Scully in 1951 for examples found at the Cahokia site in St. Clair and Madison counties in Illinois. An early Mississippian point has been found dating in the ad 900–1300 range.