Describe symbolism in Mystery Train: Images of America in Rock 'n' Roll Music by Greil Marcus

Marcus uses the example of Huckleberry Finn to illustrate the ideals of rock music. It is important to keep in mind that this example can be used to symbolize the break of rock 'n' roll music from the rules of the time, as Huck broke away from his aunts' rigid rules to raft the river with Jim.