What is the author's style in The Monkey Wrench Gang by Edward Abbey?

The author uses a combination of language styles in the novel to switch between characters. When speaking as Hayduke, Abbey uses simpler language mixed with extreme profanity, as Hayduke is a character filled with anger, emotion, and a sense of mistrust. When speaking as Abbzug, Abbey uses a blend of intellectual language and very minor profanity. Her character is also passionate, but in an almost uppity tone, and the language used when pertaining to Abbzug portrays that.