God knows I gotta throw my two cents in here- Not to dissapoint but this type of artifact in very difficult to date unless found in situ with other types. You will have people slap all kinds of names and dates and cultures on this but the fact of the matter is (like badandy said) these were made by a number of different people during different times. I would like to say that I really like the color on this one- very nice, appears to be good flaking to, I would be very happy with it. Did you find any other artifacts at the site that this came from? It may help date this one.