Ternary diagram with each of the three apexes representing a composition from the three major constituents: OH-bearing constituent (e.g., H₂O), tholin-like constituent, and unknown dark constituent. The circles represent the crater floors and the triangles the ejecta blankets. The brownish-red color corresponds to the dune craters, the blue to the plain craters, the magenta to Menrva, and the pink to Sinlap. We note the close overlap between the symbols for the composition of Soi and Menrva subunits.