I agree with Tom that it looks like a Meadowood blade. Often made of Onondaga chert, which appears to be the case. Often found as cache blades. They were the preforms for Meadowood points, so they were often cached and retrieved when needed, and then fashioned into points. Here is the point type that would be fashioned from such a blade:
Very nice point. I have a similar point with side notches that I’ve not been uncomfortable putting an ID on. I will post it separately with reference to this post.