You could see a split-wedged rock from the road and there was a conservation land parking where I hid my car so I could sneak back across to the other side of the road, so I could go down into the wet "break out" and check it out. First I saw a rock pile:
Then got a look at the split-wedged rock I had seen from the road:[It is worth clicking on the picture.] I think this helps settle a question about the meaning of split-wedged rocks. This is not an offering or a donation because it is so obvious that the wedges are shims that hold the upper rock in a specific position. Perhaps the main rock was deliberately split? It implies a meaning to these things that is different from the idea of propitiating a spirit that lives in the rock. A split wedged rock like this is something else.
Right nearby, another split-wedged rock:Again the rock seems deliberately split but this time with a suggestive quartz vein.
I notice that the first split wedged rock above also has a thin quartz vein parallel to the split. So maybe this all is more like: unleashing the power of the quartz?