Rock climbing rating scale. .
Rock climbing rating scale. [1] Oct 2, 2025 ยท Rock, in geology, naturally occurring and coherent aggregate of one or more minerals. This is a list of rock music genres consisting of subgenres of popular music that have roots in 1940s and 1950s rock and roll, and which developed into a distinct identity as rock music in the 1960s, particularly in the United States and United Kingdom. Rock is a form of popular music that emerged in the 1950s and that by the end of the 20th century was the world’s dominant form of popular music. Rock history can thus be organized around both the sound of cities (Philadelphia and Detroit, New York City and San Francisco, Liverpool and Manchester) and the spread of youth cults (rock and roll, heavy metal, punk, and grunge). Rock music is a genre of popular music that originated in the United States as "rock and roll" in the late 1940s and early 1950s, developing into a range of styles from the mid-1960s, primarily in the United States and United Kingdom. It originated in the United States and spread to other English-speaking countries and across Europe in the 1960s. 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. The three major classes of rock are igneous, sedimentary, and metamorphic rock. Such aggregates constitute the basic unit of which the solid Earth is composed and typically form recognizable and mappable volumes. 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. scoc1mn wo9 qjnl xc ap2s wyd z3q vgudp vqs1wd0i lti
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