How white guys reconstruct rock piles.

Around 1:58 in this video it shows a "burial mound" rock pile, that was excavated and then "reconstructed". 

Fort Ancient: A Glimpse of Ancient America

I never saw a rock pile built like that. Or, look at this one (from guideofgreece.com):

With some authority I claim Indians usually stacked stones on top of each other. In particular, you never see a paved dome. It reminds me of another (from M. Gage):

So, it seems likely this is the appearance of a fake rock pile.