Rock | Definition, History, Artists, Songs, & Facts | Britannica
Jan 6, 2026 · 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 …
Rock | Definition, Characteristics, Formation, Cycle, Classification ...
Dec 29, 2025 · 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 - Pioneers, Genres, Legends | Britannica
Jan 6, 2026 · The trouble is that the term rock describes an evolving musical practice informed by a variety of nonmusical arguments (about creativity, sincerity, commerce, and popularity).
Rock and Roll Hall of Fame and Museum - Encyclopedia Britannica
Jan 2, 2026 · 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 …
Rock Springs | Fossil Fuel, Mining, Cowboy Town | Britannica
Rock Springs, city, Sweetwater county, southwestern Wyoming, U.S. The city is located on Bitter Creek, at an elevation of 6,270 feet (1,911 metres) among sagebrush plains and hills, 13 miles (21 km) east …
Rock - Social Change, Cultural Evolution, Music Revolution | Britannica
Jan 6, 2026 · 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. Yet, at the beginning of the 21st century, rock and the …
Rock and roll | History, Songs, Artists, & Facts | Britannica
Dec 30, 2025 · 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 …
Metamorphic rock | Definition, Formation, & Facts | Britannica
Dec 27, 2025 · Metamorphism can occur either when a rock moves from one position to another along a single geotherm or when the geotherm itself changes form. The former can take place when a rock is …
Little Rock | Arkansas, History, Map, & Facts | Britannica
Dec 25, 2025 · Little Rock, city, capital of Arkansas, U.S. It is the seat of Pulaski county, on the Arkansas River in the foothills of the Ouachita Mountains in the central part of the state.
What is rock music? - Britannica
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.