Some other nice piles from the site I was just describing:
Another nice one:
And a detail:Note the white rock. This is near the top of the hill but the same theme appeared near the bottom:I would say fewer than 30 piles on the slope.
This is about rock piles and stone mound sites in New England. A balance is needed between keeping them secret and making them public. Also arrowheads, stone tools and other surface archaeology.