James L. Murphy, "The Aboriginal Use of Petrified Wood in Southeastern Ohio," Ohio Archaeologist 23, no. 3 (summer 1973): 29-30.
The prehistoric utilization of petrified (silicified) wood in southeastern Ohio (Athens Co.) is documented. The raw material is probably derived from fossil wood weathered from Conemaugh shales and siltstones. Chippage from Archaic and Late Prehistoric sites, as well as a hammerstone from the Early Woodland (Adena) Daines I Mound, indicate that petrified wood was utilized for both chipped and ground artifacts throughout a long period of time, although it was never an abundant resource.