A link from the NEARA bulletin board:
Through my blinders, this looks like "hollows", "tails", and "ski jumps". In other words, pretty much the same culture as I have been writing about. Let's call it the "Inland Empire" for a moment. It is particularly interesting that the Hudson River is less of a barrier than the Nashua River; as if to the east of the Nashua some other culture was blocking this Inland culture. Perhaps Norman M. can comment on the similarity with the Oley Hills site.
Update: Norman corrects me. The Nashua River is not a real boundary.