Final answer:
The lines that illustrate the desolation of Yuba City describe the barren and rocky landscape surrounding the city.
Step-by-step explanation:
The lines that illustrate the desolation of Yuba City are: 'All about him was ridgy roll of wind-smoothed, rain-washed rock. Not a tuft of grass or a bunch of sage colored the dull rust-yellow. He saw where, to the right, this uneven flow of stone ended in a blunt wall. Leftward, from the hollow that lay at his feet, mounted a gradual slow-swelling slope to a great height topped by leaning, cracked, and ruined crags.'