Well now, here are some results from yesterdays dig. The teeth and parts of the skull cap from Bison Antiquus and a Scottsbluff II from the same strata. I am right in the middle of the campsite with lots of firepit and hearth stones.
Evidently, Scottsbluff II was a choice point for big game. I've found only 1 Scotty. It was 16 feet down a filled in sinkhole in Travis County,Tx. This 5" long serrated beauty lay in a muddy matrix of bison remains. The sinkhole/pit was dug to a total depth of 27 feet, but no other points or remains were found.
Well now Mike, the material is heat-treated Cummins Creek Chert and it does have a rootbeer flavor. Cummins Creek Chert comes in all colors and it makes for very interesting digging. So many times I find big pressure flakes with such incredible colors and patterns that I just sit down and think about where the finished piece might be.
Digging out that deep sinkhole must have taken awhile....I salute you for staying with it. That big Scottsbluff was a salute unto itself. Caves, Sinkholes and big hillside camps; you and I are very fortunate to own such places.