There were a number of piles with quartz or other interesting rocks near these northern Fitchburg mounds. For example, on "Mound C":Is this hematite? I do not know that material.
Further away, this interesting one: I never saw such a thin necked manitou stone. Also on "Mound "C, a little handful of quartz chunks (there were other chunks at the other end of the pile)On a separate pile (Mound C is in the background), was this pretty quartzite cobble: closer:Several smaller piles with notable quartz, dot the area: