Impact?

The buz word here is "impact craters"
As I look at these images I see more. The name does imply that the craters are formed by impact. These craters on Mercury have a different look to them. Imagine if you would a planet being formed, the surface in a hot liquid state "boiling" with bubbles coming to the surface and bursting. As the surface cools the bubbles leave pock marks, craters.
I am not an astronomer, but I do have an interest and an imagination. I am thinking these "impact craters" may not indeed be that. I am sure you have seen images of bubbling lava.
Just a different view on craters.