Interesting, I find tons of similar looking items around the Pawnee Grasslands of Colorado! I've found all kinds of flint/chert, agate, petrified wood, jasper, etc, and a lot of it actually looks like scrapers or some type of tool. Do you ever help people identify what they've found?... Maybe when I officially start blogging I will have to ask my Steemit friends if they can identify some of my curious finds. Thanks for the informative and intriguing write up!