It has been suggested that the ice shards form through sublimation, like the penitentes of the Andes. https://science.nasa.gov/plutos-bladed-terrain https://sc

It has been suggested that the ice shards form through sublimation, like the penitentes of the Andes. https://science.nasa.gov/plutos-bladed-terrain https://science.nasa.gov/plutos-bladed-terrain https://en.wikipedia.org/wiki/Penitente_(snow_formation) https://en.wikipedia.org/wiki/Penitente_(snow_formation)