Very nice finds! The first one in the top row, the one on the right, looks like what we would call an Otter Creek up here in the northeastern states. Because the notching, and the shape of the base, makes the tangs hang down, thats what we refer to as dog ears. It would be put into the mid to late archaic time frame for us. It's funny how much heads look alike but yet they are given different names for different parts of the country. Good hunting! Jim