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. It originated in the United States and spread to other …

Rock - Pioneers, Genres, Legends: For lexicographers and legislators alike, the purpose of definition is to grasp a meaning, to hold it in place, so that people can use a word correctly—for example, to …

Mar 2, 2026 · Rock, in geology, naturally occurring and coherent aggregate of one or more minerals. Such aggregates constitute the basic unit of which the solid Earth is composed and typically form …

Rock became the most inclusive of musical genres; if other kinds of music—e.g., classical, jazz, easy listening, country, folk, etc.—are marketed as minority interests, rock defines the musical …

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, …

Rock - Social Change, Cultural Evolution, Music Revolution: How, then, should rock’s contribution to music history be judged? One way to answer this is to trace rock’s influences on other musics. …

Feb 9, 2026 · Rock - 1960s, British Invasion, Psychedelic: Whatever the commercial forces at play (and despite the continuing industry belief that this was pop music as transitory novelty), it became clear …

rock music, or rock and roll, Musical style that arose in the U.S. in the mid-1950s and became the dominant form of popular music in the world. Though rock has used a wide variety of instruments, its …

Rock music is a form of popular music that emerged in the 1950s and can be defined as “a form of music with a strong beat”—it is difficult to be much more precise. It is also called rock and roll. Rock …

Mar 5, 2026 · Sedimentary rock, rock formed at or near Earth’s surface by the accumulation and lithification of sediment or by the precipitation from solution at normal surface temperatures. …