Nice point what ever it is !
I have not come to any personal conclusions regarding intentionally snapped base points, and have not found any that come to mind as I write this. With that said, there does seem to be quite a few found in certain regions, and most of them appear to have the same characteristics as Kirk type points. It seems to me that if they were not intentionally snapped, then the points just broke at their weak spot, which might be an indicator of the type of work or job those type points were used for. This makes me wonder why Kirk points from my region of the Delmarva peninsula don't seem to be found near as often with the bases snapped, like they seem to in other areas? I think that Kirk points where they are found, tend to be classed as the same general age as Decatur type points, which more often than not have burin flaked bases. The most logical reason I have heard for burin flaked bases on Decatur points was to provided a dull flat base to the point to help prevent splitting the shafts they were hafted too, the same general purpose as ground bases in my opinion. Perhaps some knappers in certain regions discovered that it was easier, or more controllable, to thin the point base to a desired thickness, and then snap it off, than it was to finish a base and then try to take off burin flakes from each direction. To an unskilled knapper like me, base burin flaking seems to be one of the most difficult knaps to perform?