I have been on the hunt for some decent local rock for a while. The other day I finally, and more or less accidentally, found some great rock just a few miles from my house. I drove right by this about 15 times last year elk hunting. The rock seems like quartzite, although it is very easy to work. It flakes like chert, but has sparkles like quartzite, gets extremely sharp and is very tough. There is some evidence that this was used in the past - lithic scatter above and below the material which is about 30 yards wide and 150 yards long. One chute of knappable rock with nothing on either side. It abruptly ends on all four sides.
The rock is about 1 mile from a cave that was probably occupied and was excavated at some point evidenced by several mounds of dirt in front of the cave all about the same size like you would get from using a screener/sifter, and about 2 miles from a drive line that goes up and over the mountain into the next drainage. It is also about 3 miles from another cave that an Indian burial was excavated in the 1930's.
Patrick