

Neat stuff.
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.
That large vertical piece might not have been vertical before the tree smashed down on the pile. It would be an unusual feature. The water is just to the right in this photo. Some other piles along the edge there:
Those are along the waters edge. Back one "unit" of spacing uphill from these, another loose row of piles. Here are some details:

A quiet spot, out of the way and cut off by the highway. As usual, there is something rather specific going on here. I hope someone goes back to figure it out.

Here is a little video clip:
Another:
The piles were mid-sized with large rocks, and they looked like they were evenly spaced, suggesting a calendrical use.
This gives you an idea about how recently people were in here building rock piles.
But my guess is that this Beaver Brook/Elizabeth Brook watershed divide has always been a highway and always been an important area to the Native Americans. Here in Harvard, Boxborough, Bolton the Indians must have been living or at least visiting until quite recently. [Interestingly there is no such recent activity in many places, so I figure this tells us about Indians in the historic period.]
I cannot remember the context of this one, it was at the foot of the slope getting down to the swampy area. Proceeding further I came to water in a place that matched my impression of the swamp next to the highway. Looking across the water there was a little island.
As I looked across (longingly) at this island I could see what looked like two rock piles out there - one to the right behind the large fallen down tree, the other to the left at the highpoint.










This is a close up of the cairn visible just in the background, to the left, in the prior photo.
A strange combination of structures here. I will be back out at this site next month, when hunting season is over.