This is an example of the unfortunate choice of words I was trying to illustrate. The situation you are describing is “order” in a geometric sense, but not a thermodynamic sense. I think heat provides a better example.
A heat source and a heat sink in a box (closed system) is ordered with “hot stuff” in one place and “cold stuff” in another place. The difference allows us to extract energy but eventually the system flattens and everything reaches the same temperature. When everything is the same, isn’t that order? Of course it isn’t in the thermodynamic sense.
If I now introduce energy from an external heat source, or an imbalance from and external heat sink, I can possibly re-order the interior of the box but in total, my slightly larger universe is still marching toward thermal equilibrium. In your example, the settled rocks have no further energy to offer without application of external energy.
Again, I’m simply trying to make the point of how poorly words have been chosen to explain the second law.
I believe the discussion was originally, order out of chaos. I gave two solid example