13 mile long Crop Circle in the Desert

13.3 miles of lines were carved into a dry-lake bed in Oregon in 1990. What was discovered looked like a Crop Circle in the middle of the Desert...A perfect "Sri Yantra Mandala Formation". This ancient symbol was so precise it was flawless...Each line was 10 inches wide and 3 inches deep carved into extremely hard compact dirt that is very difficult to dig in...No cars where seen for miles, no tire tracks were seen for miles...No footprints were seen at the site or anywhere around it...No apparent signs of tools were used...And no one was seen in the area...I don't see any dirt from the 13.3 mile long 10 inch wide hole that was carved into the desert at a depth of 3 inches...There must have been a lot of dirt so it begs the question where is the dirt? The close up photo of the 4 lines looks clean with no extra dirt laying around outside the ditch that was made from each of these lines being dug out of the desert...The whole formation is about a quarter of a mile wide...This happen on Aug 10, 1990...

Here are some links below:

http://cropcircleconnector.com/ilyes/...