From New Scientist:
"Near the eastern edge of a dark highland region of Pluto known as Cthulhu Regio, a canyon and a crater meet. Elliot crater, a majestic feature 85 kilometres across (in the lower left quadrant of the above photograph), is a relative rarity in these parts of the solar system. Across Pluto and its large moon, Charon, there is a relative shortage of large craters. That may be telling us something profound about how planets form."
((Pluto: a dwarf planet, now with added paywalls))