Any surface that has soil exposed to wind and precipitation, whether it flat or sloped. If there is wind, or water, any soil that is not held by vegetation will be eroded. Extreme flooding may remove both the soil and the vegetation.
There are windstorms on the surface of Mars due to the heating of the atmosphere. Therefore, there would be wind erosion on the surface of Mars.
very bad t storms would be most likely to cause erosion. so would snow
wierd
in a wall
Uplift replaces rocks on Earth's surface lost the process of erosion.
erosion
In a hot and dry area
Panhandle
The sides of the canyon would always be crumbling into it, but as that would mean it was getting wider, it wouldn't fill up, just get more level. But presumably there's a stream/river at the bottom which caused the canyon in the first place and this is likely to continue the erosion.
Yes it will be a flat boring circle
High Plains
Meteorite and asteroid impacts would cause erosion of the moon's surface. Man will also have had an almost minuscule impact as well due to the moon landings although this will be so tiny as to be virtually unmeasurable!