features in common to comets and snow

It was quite cold this morning when I went out - maybe near -20C with strong winds up to 40kmh. So why go out? Well, it is exhilarating and stimulating.

And it provides a control for erosion in snow aided by sublimation. I see it as an analogue to what is happening on 67P

One sees  layers obviously. However, there is also quite a range in texture over quit short distances:

67P also shows smooth and rough surfaces adjacent.

In the above example "Cheops" was thrown several meters by a snowmobile and showed no evidence for rolling or breaking up. Had however, virtually no tensil strength. wob