Chapman (1975:251-2) notes that Wadlow points are found primarily in Northeast Missouri. The diagnostic feature of this artifact is the fact that the blade is medium to long with edges that are either convex (out curving) or straight. Chapman notes that length ranges from 80 to 250 mm; thickness is ranges from 11 mm to 19 mm. Perino (1968:98) noted that the Wadlow points are often found in caches on blufftop sites. Chapman (1975:252) places this artifact type in the Late Archaic Period (3000 to 1000 BC). Morrow (1984:16) notes that Wadlow points are rare in Iowa and narrows their age to 2000 to 1000 BC.