DaveSmith
Full Member
I found this while searching for geology rock type identification, but turned out to be artifact related and where the stone was quarried. I just scanned over it, but it looks to be very detailed. It is NC specific.
http://www.rla.unc.edu/Publications/pdf/ResRep25.pdf
http://www.rla.unc.edu/Publications/pdf/ResRep25.pdf