Brad... I got to thinking about the etched mound after we talked last night. I believe and think that everyone will agree, that it was great that you were able to take pictures and video of the mound when you did! Due to the void underneath it, which was apparently from water and mud flowing between it and the actual rock cave floor and due to the fact that it was sinking, I believe that it was and still is at risk of being totally destroyed by nature itself. I don't know if you can or would even want to find where the water and mud is flowing into and undercutting the mud/dirt on top of the rock floor but if you do, you might want to try to block it's flow, so that it will not continue to undercut the etched mound. I know that you believe that it may be impossible but we need to try to find a way to harden the etched mound and actually move it to the high rock shelves just inside the entrance of the cave. Yes, it will be hard and maybe impossible to accomplish but we already know that someone carved it out and moved it to it's present location just on the other side of the cutout. Just a thought that we all (you, Chelsea, your grandson, son-in-law, Jordan and myself) need to discuss and maybe accomplish on a joint combined effort. Once we get the etched mound into natural light, I am almost certain that the remaining hidden etchings will be more visible to the naked eye and to the cameras and video recorders.
Frank
Is the mud underneath soft enough to slide a sheet of plywood a little bigger than the mound under it so it can be moved? Or a steel sheet? Not too thick so its not heavy but strong enough to carry the mound? It would be thinner then the plywood and cut through the mud better. Good luck moving it in what little space you have.
Clay