Here is the problem Saachi, your spending so much time looking at the boulders that your not leaving them to look for the next marker, these Boulders are meant to lead you somewhere, you can spend years of your life trying to figure out what's on these boulders, or you can go find the next marker in the area and then figure out how it relates back to these two markers.
This is what I have been saying forever it seems, The layout of multiple markers are more important than what is on each one of them.
For instance you find A single Boulder Marker that has writing on it, after spending a ton of time trying to figure out the writing, you look around and find two more markers, and all of a sudden you realize your single marker is really only one point of a triangle of boulders.
Another Example, You find A single Boulder with Carvings on it, and after even more time trying to figure it out you find out that it is just one of two boulders that align with multiple other two alignments boulders at different angles to a crisscross spot.
So here is the Moral of the Story, Don't get hung up on the carvings and writing on the rocks, look for patterns and layouts with other standout markers in the area.