The big loose stone on top was placed as a landmark the smaller hooked stone to the right is the pointer and was carved out of the top of a hoodoo.
This is by Cimeron NM
Maybe... maybe not. It does fit the profile, if it is then it is pointing to the next trail mark; should be visible from that point and not over 1/4 or 1/2 mile. If there is no additional markers then it's probably natural. (No daylight passage under it would mean it is pointing the trail out; so you might want to look behind it also)
G7