- Rock | Definition, History, Artists, Songs, Facts | Britannica
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 English-speaking countries and across Europe in the 1960s
- Rock | Definition, Characteristics, Formation, Cycle, Classification . . .
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 recognizable and mappable volumes The three major classes of rock are igneous, sedimentary, and metamorphic rock
- Rock - Pioneers, Genres, Legends | Britannica
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 Portal | Britannica
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 include Eric Clapton, Jimi Hendrix, the Beatles, Tina Turner, Led Zeppelin, Courtney Love, Bob Dylan, and Patti Smith
- Rock Hill | City of Culture, Historic Sites Parks | Britannica
Rock Hill, city, York county, northern South Carolina, U S , near the Catawba River, 26 miles (42 km) south of Charlotte, North Carolina Established in 1851 as a depot on the Charlotte and South Carolina Railroad, it was named for a flint hill in the vicinity
- Igneous rock | Characteristics, Examples, Formation, Types | Britannica
Igneous rocks are formed from the solidification of magma, which is a hot (600 to 1,300 °C, or 1,100 to 2,400 °F) molten or partially molten rock material Earth is composed predominantly of a large mass of igneous rock with a very thin veneer of weathered material—namely, sedimentary rock
- Sedimentary rock - Deposition, Stratification, Weathering | Britannica
Sedimentary rock - Deposition, Stratification, Weathering: The sedimentary environment is the specific depositional setting of a particular sedimentary rock and is unique in terms of physical, chemical, and biological characteristics
- Rock Island | Mississippi River, Quad Cities, Fort Armstrong | Britannica
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 which it was named
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