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 …

Oct 2, 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 …

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 …

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. Other successful rock singers, musicians, and groups …

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, In geology, a naturally occurring and coherent aggregate of mineral s. The three major classes of rock— igneous, sedimentary, and metamorphic —are based on the processes that …

Rock Island, city, seat (1833) of Rock Island county, northwestern Illinois, U.S. It lies on the Mississippi River (bridged to Iowa) at the mouth of the Rock River and opposite the island for …

Oct 11, 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 …

Nov 9, 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 …

A weathered “plug” of volcanic material circular in shape, one mile in circumference and 350 feet (105 metres) high, Bass Rock rises precipitously from the sea, making access virtually …