There is NO geological process which creates stacks of rocks free of debris and fill material. A STACK OF STONES IS ARTIFICAL. Thanks for this gem goes to BILL DONATO, an archaeologist.
If you did not know this and few people do, then your game just went up a notch.
The Stone Lines are accepted as artificial because they are stacked rocks.
Cairns are also accepted as artificial for the same reason. The problem in North America is that archAeology claims that there are no megalithic structures so obvious cairns go unexamined and are ASSUMED to be natural.
In reality North America contains vast numbers of ancient megalithic cairns.
