Base flute is artifact removal scar
These two points from the Genesee River valley are representative of two different periods of Paleo Indian culture. The top point is a lanceolate Clovis Point made from slate. This point is 4- 1/4 inches long and displays a very well shaped fluting at the base. The shape of the fluting is that of the previously described plano-convex point. This is further evidence that many base flutings from fluted points are flaking scars from artifact removal. Points made from slate were honed to a sharpness that exceeds todays surgical scalpels.
The second point is a Crowfield style stone point. Also known as Eastern Folsom, this weapon point features a "blood channel" just above the base fluting, presumably to bleed out its victim. Created during the Folsom Period, these wide points have a short base fluting that is closer to the Clovis fluting style than the longer, (base to near tip), style of the true Folsom Point.