I will acknowledge that I may have marked a "few" hills or sink holes. However, look at the total picture. I would argue that there's a "pattern" that can be easily seen that shows the path of the "explosion" or storm. Site 252 is a "farm" in Wayne County. Guess what, the farmer followed the shape of the terrain. In this case, the "bowl" of the crater. Also, the road curves around the depression that was formed by site 253.

I did make a few more mistakes around craters 666, 669, 661. These are manmade. I did not make a lot of circular sites though. I "sort of" knew these were suspect, so I drove out to them (They are probably 20 miles or so from where I live). I was unaware of anyone using this type of farming technique in Eastern Carolina. I was told by the farmer that this is a method he can use to get rid of animal waste (solid waste) from his pig houses.