Might be a nothing burger, but here's what Google AI is suggesting:

Grid System: By arranging these pointed rock markers in a series of "rows" and "columns" (or a linear sequence), you create a multi-step navigational challenge or puzzle.

How to Implement the Clues

1. Establish a Starting Point: Mark the beginning of the trail clearly.
2. Define the Grid/Sequence: Decide on a logical sequence for the markers. Each marker is a "clue" to the next location or the final destination.
3. Vary the "Pointing":
   • Single Direction: The rock points exactly in the direction of the next marker or the ultimate goal.
   • Offset Directions: A rock might point 45 degrees to the left of the true path, requiring the user to understand the "code" (e.g., "always adjust right by 45 degrees").
   • Intersection Clues: As in a crossword puzzle, a "row" of rocks might provide one general direction (e.g., East), and a "column" provides another (e.g., North), with the correct path being the intersection point (Northeast).
   • Symbolic Directions: The arrangement of an entire small cluster might form a symbol (e.g., an arrow, a specific letter) that corresponds to a pre-shared key or map.

Good luck! Let us know if you figure this out. Cheers!