Pictured! 4 11/16" patinated Knife River Flint Archaic Blade found in Eastern South Dakota.

4 and 11/16" heavily patinated Knife River Flint Archaic Blade found in Eastern South Dakota. From the collection of the late Harlan Olson. Published in Indian Artifact Magazine November 2003" Election Day 2002" by Harlan Olson (photo) p. 58.