It depends what you mean by dirt and gravel. On Earth much of the weathering which produces them depends on water. There is no nutrient rich equivalent of soil, nor water-rounded pebbles, but there is dust and breccia. (Breccia is composed of small fragments of broken rock), both of which probably result from micrometeorite impact.
No
No Io does not have dirt or gravel.
We know next-to-nothing about the surface of Saturn. We can guess that something at least resembling gravel exists there, because it exists on Saturn's moon Titan.
no
Since nobody has ever been to Deimos, scientists aren't certain whether or not it has dirt or gravel. However, since both dirt and gravel are created by the action of wind and water, it seems likely that Deimos does not have these things, since it lacks both liquid water and an atmosphere.
it is called cam dust
no
No Io does not have dirt or gravel.
jupitar has dirt not gravel
Ye
We know next-to-nothing about the surface of Saturn. We can guess that something at least resembling gravel exists there, because it exists on Saturn's moon Titan.
Yes, dirt
no
no
yes dirt and gravel are measured the same.
dirt gravel because it has some nutrients in it and gravel does not.
yes
No.