I was watching a program about the New Horizons space probe and was fascinated by the new revelations about cryolava/cryomagma, and the amorphous planes covering Pluto(98% nitrogen ice).
I'm wondering how this might affect the idea of a human colony on an ice-world/cryo-world. In particular:
How would you keep structures from slowly sinking into the surface of a planet completely covered by cryolava?
How fast would this sinking occur?
I'm assuming the habitat will need to be kept warm, and would therefore accelerate the process.
I imagine for small habitats, this might not be a big deal, as they could be on wheels and roll along the surface, although this could scale poorly to larger settlements/cities
Quick freezing point chart from wikipedia data
pure freezing substance point H2O 273.2 °K CO2 216.6 °K CH4 90.70 °K CO 68.13 °K N2 63.15 °K approx. surface temp. Pluto(for reference): 33°K - 55°K