Search results
The following is a list of rock types recognized by geologists. There is no agreed number of specific types of rock. Any unique combination of chemical composition, mineralogy, grain size, texture, or other distinguishing characteristics can describe a rock type.
Rock and roll. Rock and roll (often written as rock & roll, rock-n-roll, rock 'n' roll, rock n' roll or Rock n' Roll) is a genre of popular music that evolved in the United States during the late 1940s and early 1950s. [1] [2] It originated from African American music such as jazz, rhythm and blues, boogie-woogie, electric blues, gospel, jump ...
A rock is a naturally occurring solid. Rocks are made of collections of mineral grains that are held together in a firm, solid mass. They are made of minerals (which are crystalline ), or other mineral-like substances.
