Been pondering...
Do you think they were trying to entice you to dig beneath that rock? A few things and a few possibilities..stood out.
1. The left lobe seems to have ears. As if it might be a fat cat or owl.
2. The right lobe is an owl or cat facing you sitting on a couple of boxes. There seems to be specific linear carving from the top box to the head.
3. This puffy shape looks similar to one or two I have seen, but they were in much smaller form (do not know the meaning for sure but think of them as favorable.)
Perhaps since this figure 3 does not seem to be shaven or flattened like rest of the rock...it may both be a symbol for something and a topo relief. If so I might expect to find confirmation signs or further directions on it.
4. The blade shape of this piece of the picture with 4 on it, reminds me of a similar piece on a trail monument I posted that seemed designed to beckon the unwary to sure death.
The red arrows are areas I would look at for danger signs....if there are any.
The lay of rock below that whole rock face could be natural.The growth of lichen or emergence of caliche natural too. But it reminds me a dead lamb. Head to the left. Ear and most the muzzle in white. Broken neck..its head is twisted the wrong way.
Toward right..things I would just examine to see if anything useful there,half expecting to see danger signs.