thanks for the input shortstack, and yes i do believe this rock Carin is in reference to the stones in the back ground,if you look thru the hole in the carin,you see a stone the color and some what the shape of the top stone,and that stone looks like its made out of caliche. and i belive the thin stone is showing me,that after i remove the large caliche stone,there will be a thin cover that i must remove to get to the chamber entrance. of course this is just a guess on my part. till i remove that caliche stone and dig down thru the next thin cover to find a chamber,if it is even there,i cant prove this at all.so please just take this as a guess by a green horn rookie. but the stone in the back ground looking thru the hoyo, does look like it was made by caliche. thanks for the input shortstack,and i like your thoughts on the stones in the back ground,i think they are tied together in some way.