Thanksgiving in Lexington

This Thanksgiving I visited some relatives in Lexington, MA.  After dinner, the whole family went for an afternoon walk through some undeveloped land behind the house. There were many familiar sights, such as stone walls,

and loose rock piles.

Then I saw this, a propped boulder resting on a large central support stone.  The bottom edge of the boulder seems to curve around the support stone, as if someone chipped away rock to get this effect.

A marker or memorial left by Natives, and hidden in plain sight?