(Encyclopedia) joint, in geology, fracture in rocks along which no appreciable movement has occurred (see fault). Nearly vertical, or sheet, joints that result from shrinkage during cooling are…
(Encyclopedia) sandstone, sedimentary rock formed by the cementing together of grains of sand. The usual cementing material in sandstone is calcium carbonate, iron oxides, or silica, and the hardness…
(Encyclopedia) Fletcher, John Gould, 1886–1950, American poet, b. Little Rock, Ark., educated (1903–7) at Harvard. After traveling throughout Europe, he became a leader of the imagists in England.…
(Encyclopedia) Arches National Park, 76,519 acres (30,979 hectares), E Utah; est. as a national monument 1929, designated a national park 1971. Located in red-rock country and overlooking the gorge…
(Encyclopedia) TiruchirapalliTiruchirapallitĭrˌ&oobreve;chĭrəpŭlˈlē [key], formerly TrichinopolyTiruchirapallitrĭchĭnŏˈpəlē [key], city (1991 pop. 711,862), Tamil Nadu state, SE India, on the…
(Encyclopedia) Pennebaker, D. A. (Donn Alan Pennebaker), 1925–2019, pioneering documentary filmmaker, b. Evanston, Ill. His first film, Daybreak Express (1958), is a five-minute short detailing New…
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As impenetrable as the band may sometimes sound, Radiohead is also apparently incapable of recording a boring album.
Eight months after the release of the ambient wonder wave…
(Encyclopedia) concretion, mass or nodule of mineral matter, usually oval or nearly spherical in shape, and occurring in sedimentary rock. It is formed by the accumulation of mineral matter in the…
(Encyclopedia) quartzite, usually metamorphic rock composed of firmly cemented quartz grains. Most often it is white, light gray, yellowish, or light brown, but is sometimes colored blue, green,…
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