- Rock and run climbing pitons. The three major classes of rock are igneous, sedimentary, and metamorphic rock. Folk musicians, led by Bob Dylan, went electric, amplified their instruments, and sharpened their beat. The immediate consequence was folk rock. Rock's origins lie in rock and roll, a new form of American popular music in the 1950s that was personified early on by Elvis Presley. Yet, at the beginning of the 21st century, rock and the music industry faced a new crisis. Vinyl records were replaced by the compact disc (CD), a technological revolution that immediately had a conservative effect. It is also called rock and roll. Rock - 80s, 90s, Pop: The music industry was rescued from its economic crisis by the development in the 1980s of a new technology, digital recording. 5 days ago ยท Rock, in geology, naturally occurring and coherent aggregate of one or more minerals. Other successful rock singers, musicians, and groups include Eric Clapton, Jimi Hendrix, the Beatles, Tina Turner, Led Zeppelin, Courtney Love, Bob Dylan, and Patti Smith. xv1duc ydgl cnynxkapd bo60x xs5gs log z53y rlltq 740e9x xlb0a
