That was my guess as well Pat. The cone shape of it is what peaked my curiosity.
I have a couple more stones to like the one SH found recently, (the big flint game stone or hammer stone), and I also have one that is flatter more like a discodial. I took pics of them to post and wouldn't you know it, I was fighting with the camera and deleted the darn things so maybe I will get some more pics and post them.
You just never know what you may find.
It's definitely going in my hammer stone bucket.
Whether a core or shaped, the non smooth distressed state of the impact area is very distinctive.
If you happen to have a Clovis or other Paleo point around with a ground base, under magnification the same shattering will be evident ( "ground base" stems are not sanded smooth but are delicately scraped, shattering the flint without creating a flake )