The reality is of course that the frozen gases and radiation polymerized goo that answer for soil on the surfaces of Kuiper Belt objects exist in a truly alien regime of physics and materials science :
Plutonian natural history has few Earthly counterparts
https://www.researchgate.net/profile/Russell_Seitz/publication/260831527_Xenomict_energy_in_cold_solids_in_space/links/0a85e5327334354cd4000000.pdf