Stone flake with knapping errors

This flake, found at Gorham’s Cave in a level dated to approximately 50,000 years ago, was produced by a Neanderthal. The piece has its peculiarities – by observing its scars, which are product of previous extractions of pieces from it, we can deduce that it was not made by a very skilled knapper, or possibly, one who was still learning.

If we look at the negative scars on the flake, we can see how they form unusual shapes with abrupt terminations which are a result of errors in the knapping of the tool.

There are many errors which can lead to the appearance of fractures or deformations whilst knapping a stone tool, but we will focus on the most common ones which are in fact present in this piece. A very common error is that of the overshot flake, producing what is known as a plunging termination with a blunt edge. On the contrary, if the core is not struck with sufficient force, the fracture changes direction towards its surface instead of the intended point. This is known as a step termination.

These accidents do not always occur due to the knapper’s lack of skill but are sometimes also determined by the internal characteristics of the raw material. In some cases, they are carried out intentionally, such as the overshot extractions of North American Folsom points.