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music video

(Encyclopedia) music video, videotaped performance of a recorded popular song, usually accompanied by dance or a fragmentary story and sometimes employing concert footage. Typically three to five…

slate

(Encyclopedia) slate, fine-grained rock formed when sedimentary rocks such as shale are metamorphosed by great pressure. Slate splits into perfectly cleaved, broad thin layers; this…

Family Trivia: Independence Day Quizzes

Try Infoplease's brain-busting quizzes for Independence Day   Related Links Independence Day Trivia Packet for KidsFourth of July by the NumbersFacts on FireworksHistory of Fourth…

Internet Resource Guide

The Internet has become a convenient tool for finding information on just about anything. Because sifting through search engine returns can be more time-consuming than a trek to the library, we’ve…

conglomerate, in geology

(Encyclopedia) conglomerate, in geology, sedimentary rock composed largely of pebbles or other rounded particles whose diameter is larger than 2 mm (.08 in.). Essentially a cemented gravel,…

boulder, in geology

(Encyclopedia) boulder, large rock fragment formed by detachment from its parent consolidated rock by weathering and erosion. In engineering and geology, especially in the United States, the term is…

mesa, in geology

(Encyclopedia) mesamesamāˈsə [key] [Span.,=table], name given in the SW United States to a small, isolated tableland or a flat-topped hill. Two or more of the sides are steep and usually…

batholith

(Encyclopedia) batholith, enormous mass of intrusive igneous rock, that is, rock made of once-molten material that has solidified below the earth's surface (see rock). Batholiths usually are granitic…

Joplin, Janis

(Encyclopedia) Joplin, JanisJoplin, Janisjŏpˈlĭn [key], 1943–70, American blues-rock singer, b. Port Arthur, Tex. After dropping out of college (1963) and singing folk rock in Texas clubs, she moved…