No water in the area. I was in Joaquin Valley visiting and old army buddy.
After looking at some of the websites above provided by Charl. I am not sure if this stone hole was made by erosion or a digging weight. I have to take it to get it looked at. It could be a digging weight? This stone is very hard and heavy. Not sand stone. I had found some other pieces in the near by area years ago. Here is a pic of what describes this similar stone.