It looks like conglomerate with striations produced by distinct layers as it gathered dust or formed in layers before it broke away form a larger object
Why is one side more cratered than the other?
It got hit more.
I took a second look at the larger photo and it is not conglomerate. What seemed to be contained rounded objects are impact marks and the striations are that, not layers
I took a second look at the larger photo and it is not conglomerate. What seemed to be contained rounded objects are impact marks and the striations are that, not layers