This is rock, progressive rock.
I saw this band in 1982 a few months after this album was released.
Let me tell you about the drummer. During the whole concert the normal concert missiles were flying about, frisbees, balls, hats. When his drum solo started everything got quiet, all eyes on him. He was surrounded by a big square framework with all manner of percussion hanging around him, none of it for show, he used it all with speed and artistry. When he was finished I felt like he had played a song just like someone with a guitar or clarinet.