I noticed that Ed Lenik is speaking at the upcoming NEARA conference. I know of one of his books "Picture rocks: American Indian rock art in the Northeast woodlands" so I searched his name hoping to find more on petroglyphs. Instead I came to this youtube video. How sad is that. Move the slider to 4 minutes into the video.
[PWAX: Lenik lumps together all researchers into New England stone structures. Apparently we all believe the Irish monks built everything (we don't). Also Lenik is unaware of USET resolutions.]