Thanks for the embiggenment
Impressive to see just how long it takes (i.e. just how low the gravity is) for the ejecta to think about settling.
@Dunstan V - I'm not convinced that the leaving of the mark was the primary cause, but merely a byproduct of a scientific measurement. If one takes the view that one should never make a mark anywhere, no matter how remote nor how 'unchanged', one would never get out of bed (and one's bed would not be in a house to keep the rain off).