re: Precisely
That is one of my favorite craters on Mars. It is very mysterious. It looks, to me anyway, that it is a crater filled with an icy material that has been melted from underneath. But if it is a filled crater, why do none of the other near by craters exhibit the same features?
It has lots of nice gullies
The flat areas are covered in a cracked, bumpy, blocky terrain that looks like it is composed of an ice / dust mixture
The rim has nice layering.
Here is all.three surfaces together.