Odds and ends from the backwoods in Carlisle MA

A couple of rock-on-rocks from the edge of a swamp:Then this pretty fine example of a wall bulge. Right at the top of an outcrop, this certainly was a nice pile. There were possible fields nearby.
You can see the edge of this next one from Concord Rd if you look carefully and risk an accident as you drive around a curve:
I see this as a possible effigy, with the head to the left and slight damage to the right.