We have Clovis tools made from weathered Coastal Plain Chert. I'm also interested in this analysis on metavolcanic stone tools from North and South Carolina.
For someone a little closer to home, I would recommend talking to Andrew Barker at the University of North Texas. Archeochemistry is his bag and he frequently works in the southwest USA. He is on academia if you are interested in looking up some of his work: https://unt.academia.edu/AndrewBarker