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.
The article does mention "a huge rock pile": "The excavation uncovered a huge pile of rocks and noted that a large amount of dirt had been moved from part of the site and piled elsewhere. This represents a great deal of work in a time before shovels. The reason behind so much effort isn't completely clear."
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