This is a weird one, if reported facts are true. Perfectly consistent width/depth of lines, 1/4 mile diameter - and no footprints, tyre tracks etc nearby. Also, the actual volume of removed dirt is large - where is it?
Apparently some people have claimed they made it, but have not given explanations on the outstanding questions...
Worth a look.
Apparently some people have claimed they made it, but have not given explanations on the outstanding questions...
Worth a look.