For those that are still in suspense, I have not had time to go back to the site yet nor have I decided how I am going to proceed. I am 98 percent sure this is not a grave. I also do not think it is the top of a park bench since there are no marks indicating it. My most recent idea? Maybe it is the lid to something and the bottom portion is under the ground somewhere nearby. It would have been easy to miss with the detector since I was discriminating out iron. The site is very trashy. Just to help people envision the site a little better, there is an old cistern about 30 yards away, there were three brick buildings of some sort all around it, and the community cemetery is over a mile away so I don't think the block was carried away. I will update as soon as I have more info. That is, unless I find a great amount of treasure, and then you won't hear from me anymore, haha. Any new thoughts?