There also used to be a great source of some outstanding rhyolite in Chatham County. It was utilized for thousands of years by the ancient people. To this day, I have never seen so many chips in one place. Literally, you could not put your foot down without standing on at least dozen flakes in the main 7 acre core area. The concentration was heavier is some spots and it tapered out as you left the core area. I also had an arrowhead hunting field nearby that was also covered with big chips, that's part of what lead to understanding that there had to be a quarry site close by. I found it back in the early 1980s when I had permission to deer hunt there when it was all forest. Sections of the farm path were almost paved with chips, so many that it was difficult to walk quietlt down the road when hunting...or anytime really. Then, the land sold & it was logged, revealing how big the site truly was. Sadly, it also got developed into a subdivision. The developer had a big trench dug with a bulldozer and pushed some of the bigger rocks of rhyolite into the trench. Now, there are houses, lawns, and streets over that site.
When it was logged, people started coming and searching the site for arrowheads. Since it was a quarry site, you were far more likely to find broken points, blanks, and axe heads. Others (like Joe, our friend Bobby, me, & who knows all else) loaded up on rock. Joe hauled tons of the stuff out of there, while I took maybe a thousand pounds. I have a few hundred pounds left. Some of that rock is what Joe will be selling & what is pictured in the above link.
Jim