How does Edward Abbey use imagery in The Monkey Wrench Gang?

Imagery:

"When the cities are gone, he thought, and all the ruckus has died away, when sunflowers push up through the concrete and asphalt of the forgotten interstate freeways, when the Kremlin and the Pentagon are turned into nursing homes for generals, presidents, and other such shitheads, when the glass-aluminum skyscraper tombs on Phoenix Arizona barely show above the sand dunes, why then, why then, they then by God maybe free men and wild women on horses, free women and wild men, can roam the sagebrush canyonlands in freedom-goddammit!-herding the feral cattle into box canyons, and gorge on bloody meat and bleeding fucking internal organs, and dance all night to the music of fiddles! banjos! steel guitars! by the light of a reborn moon! - by God yes!"

"That man can hear a dollar bill drop on a shag rug."

"The fury and frustration of those years bubbled up like swamp gas, like an evil methane, to the surface of his consciousness."