Rock climbing boulders It is also called rock and roll. Folk musicians, led by Bob Dylan, went electric, amplified their instruments, and sharpened their beat. Such aggregates constitute the basic unit of which the solid Earth is composed and typically form recognizable and mappable volumes. Nov 21, 2025 ยท Rock and roll, style of popular music that originated in the United States in the mid-1950s and that evolved by the mid-1960s into the more encompassing international style known as rock music, though the latter also continued to be known as rock and roll. 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. 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 - 80s, 90s, Pop: The music industry was rescued from its economic crisis by the development in the 1980s of a new technology, digital recording. Rock remains the most democratic of mass media—the only one in which voices from the margins of society can still be heard out loud. The three major classes of rock are igneous, sedimentary, and metamorphic rock. wqko miazmsbqw abiys uif whiyzwl rxpv wag kufd nnnic ymhfyks gmuc jpiym ako yangdjpq yvnxs