Most of them I found about 3-4 miles from River. I was told That at Falcon Lake, when the water is low, you can find hundreds of them, Planning on going as soon as water is low. Mostly you will find, Perdiz very thin specimens, angosturas,paleo, lermas, etc.
Gino, I noticed that the top photo you also posted under " Artifacts for sale or Trade " ( with no wording to that effect ). Did you intend on placing it there? Left as is, some people might think they are part of my ad directly under it! If you do want to sell them, then please edit the photo!