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Originally posted by DaRAGE
hrmmm...but still...a 318 kg rock moving. Thats a bit hard with jsut rain and wind i would believe. If it rained and the surface was turned to mud....A rock of that weight would imo stay put and sink deeper into the ground.
Originally posted by chebob
........could be anything I suppose!
I believe this happens during times of seismic activity.
In the article at the link contained in the original post, in the "two theories" section, it discusses that one of the researchers has noticed multiple trails that run parallel, even when there is a zig-zag, they track each other. ,