Creative Destruction - Chelmsford Trails Maintenance
[ DAMN! Could not insert photo here. So much for buying an additional 10 gig of space on Picasa! Now I gotta go hassle with that. Sorry for the continued delay in photo postings.]
This is about rock pile sites in New England. A balance is needed between keeping them secret and making them public. rockpilesmail@gmail.com

[ IT WAS AT THIS POINT THAT I GOT A MESSAGE FROM BLOGGER THAT I COULD NO LONGER UPLOAD PHOTOS, BECAUSE I REACHED A QUOTA....NOW WHAT!?]
There was a bit of a ring of stones at one end of the larger tumble.
Here is another view with the ring visible on the right.
I wanted to comment that I do not think these are all farmer's field clearing. Click to magnify and look at the curved line of small rock piles leading up to the larger one in the upper left of the photo. That looks too geometric to be the result of random rock disposal. More generally, I am fascinated with this photo and what it suggests.
It is rare that I get to add a new "dot" to my map of sites in Concord but I was lucky to find a couple of small rock pile sites along the brook that empties from Hutchins Pond, northeast of Punkatasset Hill in my hometown, Concord.
And, while I am making excuses, the piles were not much to look at either. Buried in the moss, hidden in the ferns.
Or, with trees growing up from them.
In one place I saw a bit of quartz but the photo was too blurred to show it. Still, seeing new rock piles in Concord is a treat. I found them in two groups along what is labeled Sawmill Brook on the topo map. This didn't used to all be woods. I saw a small stone bridge, so once there were roads through here.
I doubt anyone has been here recently.

Looking carefully, it seemed that there might be some rock piles on the slope. In fact there were several suspicious "shadows on the rock" - where rocks might be piled up a bit.
The piles are damaged but the layout is still reasonably clear. In many places you could see lines of piles, evenly spaced:
I asked my wife to stand with a pile at her feet, to help show the line:
There is a lot of damaged structure up here but you still can get a decent sense of the place.
Evidently a major calendrical site. No question that these are ceremonial rock piles:
Little question that the piles along with almost every rock were part of the large scale deliberate layout.
Near the top of the slope, some larger boulders with rock piles, or damaged remains of rock piles: 
As we moved across the slope, heading towards the north side of the hill, I said to my wife that there might be some further clusters of piles. We went around a slight shoulder of the hill and did find a separate cluster of piles. I pointed out that, as we went around this shoulder of the hill, the first concave section was no longer visible. Now, with new sight lines, there was another cluster of piles. This is what I expected because I believe the use of these sites involved looking along lines of sight over, or along the sides of, these rocks and piles. Nice old piles in the dead leaves. 
Another view: