I finally took a couple pics of the flint hammerstone
that was simmilar to the one you found and also the other one I found. I meant to post these right after you found yours but me and the camera do not always get along.
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Here is the other one that is more flat than it is round
orry I did the same thing here as I did in my other post.
It occurs to me that one big use for a flint 'hammer stone' would have been to shape all the beautiful manos made of granite and quartz where they are pecked into a hand fitting round shape.
Or would that be pecker stones ?