Mudhoney also was part of the scene. In this video, you can see Krist Novoselic at the 1 minute, and 28 second mark.
Didn't know he was in there, until I watched the video. By the way, never really liked Mudhoney. I put them in the Beck Dinosaur Jr. category of noise rock.
Kurt Cobain got credited for producing this Melvins album.