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What’s the Point: Making an Impact

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What's the Point? Series image

This is the first post in a new series called “What’s the Point?” Allen Denoyer and other stone tool experts will be exploring various aspects of technologies and traditions.

Allen Denoyer, Preservation Archaeologist and Ancient Technologies Expert
Allen Denoyer - blog

(December 28, 2020)—In this post, I want to talk a little bit about what happens to projectile points when they are shot. The vast majority of projectile points made in the past ended up broken—which was the expected outcome of hunting with them. Hunters could only count on one shot with a stone point, and though they might get lucky and get more, they had to plan for just one. It’s clear they would have carried a few foreshafts to allow multiple shots without having to stop and work on their equipment.

Illustrations of various projectile points with impact fractures.
Illustrations of various projectile points with impact fractures.

It is important to remember that projectile points are just one component in hunting systems such as the atlatl and the bow. Dart and arrow points were all hafted to foreshafts, which then socketed into the dart or arrow shafts. When they were shot and subsequently broken, hunters would retrieve the wooden element that could easily have a new replacement point hafted into it. In hunting camp settings, it’s common to find broken bases of points. Sometimes people lost foreshafts on hunts and lost points in camps, which is why we occasionally find complete points.

An illustration of a dart, which is made up of the projectile point (at right) and the foreshaft (at left).
An illustration of a dart, which is made up of the projectile point (at right) and the foreshaft (at left).

By examining the base of a projectile point, experts are usually able to discern what tradition it was made in and about how long ago it was made.

Experimental foreshafts and dart points.
Experimental foreshafts and dart points.

 

Hohokam point replicas.
Hohokam point replicas.

Projectile points are made by the process of striking flakes. Every flake is a wave of energy that travels through the stone to create a fracture. Controlling this fracture allows a toolmaker to shape the rock into a projectile point.

The surface of the projectile point bears the scars of these flakes, which show how the point was made. Some material types show these scars better than others. The scars can tell us a lot about the life history of the projectile point. On larger projectile points—dart points used with the atlatl—it is common to see evidence of sharpening or reworking after a break. Flake scars that originate from the point (distal) end of the projectile point are almost exclusively created through impact.

This biface and flake show the ripples of the flake energy quite nicely. To create bifaces, most flaking is done from the lateral margins.
This biface and flake show the ripples of the flake energy quite nicely. To create bifaces, most flaking is done from the lateral margins.

Impact fracture. There are several different ways points can break. This San Pedro point (2,000 BP [before present]) has some flakes originating from its distal end (the tip). These were created when the point hit something hard, like bone. This impact fracture is multiple flakes, and it does not appear this point was sharpened again. This kind of breakage can occur when the point penetrates between two of an animal’s ribs.
Impact fracture. There are several different ways points can break. This San Pedro point (2,000 BP [before present]) has some flakes originating from its distal end (the tip). These were created when the point hit something hard, like bone. This impact fracture is multiple flakes, and it does not appear this point was sharpened again. This kind of breakage can occur when the point penetrates between two of an animal’s ribs.
Flakes originating from the distal end are almost exclusively created by impact fractures. Sometimes, if the point was not broken too much, people could reshape and reuse it. Analysts can sometimes tell that a point was reshaped by looking at the flake scars.

Another way projectile points break is by receiving too much pressure from the side. This causes them to bend and snap in two. This is a common kind of fracture when making a point. Another way it could happen is if a hunter were to drop a foreshaft on hard ground.

End shock!
End shock!
This kind of fracture leaves a flat surface.
This kind of fracture leaves a flat surface.

Toolmakers of the Clovis tradition (13,000 BP) and other Paleoindian point traditions ground the hafting areas so that the bindings would not be cut. Clovis and Folsom points (10,000 BP) have biface thinning flakes struck up their bases. This also allowed easier hafting.

The basal portions of projectile points usually help analysts identify their age and what tradition they were made in. These hafting areas may have remained more intact because they would have been wrapped in sinew and some kind of mastic, such as pine pitch.

This massive impact break indicates that this Clovis point hit something hard. This point was found at an ancient campsite in Colorado, suggesting hunters may have made a kill close by.
This massive impact break indicates that this Clovis point hit something hard. This point was found at an ancient campsite in Colorado, suggesting hunters may have made a kill close by.
Impact fracture that was sharpened in the haft. This is a Hell Gap or Agate Basin point (10,000 BP) from Colorado. It was found on a table in a laundromat! The dots show the ground hafting area. This point is so reworked, we cannot tell what tradition it was made in. It has a small amount of damage at its base from the foreshaft, as well.
Impact fracture that was sharpened in the haft. This is a Hell Gap or Agate Basin point (10,000 BP) from Colorado. It was found on a table in a laundromat! The dots show the ground hafting area. This point is so reworked, we cannot tell what tradition it was made in. It has a small amount of damage at its base from the foreshaft, as well.
In this example, the distal end shows a massive impact fracture and no further sharpening. This is a Bajada point (5,000 BP) from Colorado. It has a long basal thinning flake and a smaller one next to it that might represent impact damage from the foreshaft.
In this example, the distal end shows a massive impact fracture and no further sharpening. This is a Bajada point (5,000 BP) from Colorado. It has a long basal thinning flake and a smaller one next to it that might represent impact damage from the foreshaft.
This Clovis point from a site in Utah has a massive impact fracture/bend break. The flake along the margin was created when the distal end fractured and bent to the side, flaking off the edge. This point was found in a campsite where it had been changed out of its foreshaft.
This Clovis point from a site in Utah has a massive impact fracture/bend break. The flake along the margin was created when the distal end fractured and bent to the side, flaking off the edge. This point was found in a campsite where it had been changed out of its foreshaft.
This Folsom point is from the same site in Utah. This point broke during manufacture when the second flute flake drove through when struck. This is not an impact fracture, but sometimes can be mistaken for one.
This Folsom point is from the same site in Utah. This point broke during manufacture when the second flute flake drove through when struck. This is not an impact fracture, but sometimes can be mistaken for one.
These are all Bajada points from the San Luis Valley in Colorado. I find them very interesting, as most of the ones I have seen are incredibly battered on their distal ends. They were completely used up. They are pretty thick in cross-section, too, which definitely would have helped them better sustain impacts. Hunters would have gotten multiple shots out of these.
These are all Bajada points from the San Luis Valley in Colorado. I find them very interesting, as most of the ones I have seen are incredibly battered on their distal ends. They were completely used up. They are pretty thick in cross-section, too, which definitely would have helped them better sustain impacts. Hunters would have gotten multiple shots out of these.

4 thoughts on “What’s the Point: Making an Impact”

  1. Sharon Miller says:
    December 29, 2020 at 5:48 pm

    As always, Allen, fascinating. By the way, what prehistoric site was that laundromat in?

  2. v says:
    December 30, 2020 at 11:36 am

    Remarkable, thanks!

  3. Ray says:
    December 30, 2020 at 2:45 pm

    Thanks much for this basic yet rarely presented information. Would love to read more from you. Ps I love Bajada also!
    Thanks

  4. Daniel Hansen says:
    June 22, 2022 at 7:56 pm

    I have shot flintknapped replicas into trees examining the breakage. One end of the breakage is dished out while the other halted bases breakage always has a bulb. Right at the haft and at the tied sinew. I have found many ancient broken points showing this type of breakage along waterways in streams. This to me suggests the bases had came from trees that fell in leaving only the base thousands of years later as the shaft always has degraded leaving no shaft as always when found. And the blade ends are always dished out.

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