Calcined bone is formed when bone is heated in a fire and undergoes a chemical transformation into calcine, a substance very resistant to decay. This is one of several ways that bone can be preserved. In wet conditions with high acidic content such as bogs. These examples are useful for discussing features of stone projectile points. A projectile point is a technical term for the heads or tips of arrows, spears or javelins.
Projectile points are usually bi-facial, a term which refers to two cutting edges.
These notches were used as anchors to wrap sinew around a shaft and hold it in place. The tang or shank would have been inserted into the tip of the wooden projectile shaft. The process of doing this has been termed hafting. As the climate warmed, forests grew and smaller game prospered, resulting in the use of the bow and arrow, with its smaller projectile point. The projectile points featured in this kit are all intended for small game and probably date to the time when forests had finally dominated the landscape.