In central Virginia, "axes" which look just like that are thrown into a general catagory called "arrowheads". You can easily find them just lying around in any farm field after it rains. There's not a lot of people around here who don't have at least a few of them collecting dust on a knick-knack shelf and shoeboxes or even garages full of them are quite common.
Ah, this illustrates my point exactly! The sheer massive number of these implies that they are a natural phenomenon.
Elsewise, that would almost imply an ancient city of mass proportion once residing there, which is not otherwise evidenced.
Axes and arrowheads alike are examples of pseudodesign caused by natural forces of rocks and running water that results in natural scraping before giving birth, almost crop-like, to these products of nature untouched by human hands until discovered by nature lovers and scientists.