Below is a link to images of selected cairns. Many include a survey rod, which when fully extended is eight feet long.
Use the Picasa SLIDESHOW button to auto-display all images, or click each thumbnail pic for selected viewing.
Images of selected cairns
Last updated 2/27/2012
You might be interested in the posts on the "Rock Piles" blog about "rectangular mounds with hollows". They are, I would say, the same basic shape as some of your pictured piles. Maybe yours are older, as yours are quite smeared out.
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