These first 2 photos show the volcanic hill, in which the petroglyph is located along the base.

looking straight up.
this shows how the hill was pushed up in layers.
Above & Below are some of the Ancient Peoples writings.
Below, looking up the face of the cliff shows the volcanic activity of the past.
I believe the blue dot is some type of cosmic reflection originating from the Ancient as they attempt to communicate.  Maybe their communication beacon is located in that spot...
By turning around and facing west, this is what the view is...  Mt Shasta.
Mt. Shasta