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subduction zone

(Encyclopedia)subduction zone, large-scaled narrow region in the earth's crust where, according to plate tectonics, masses of the spreading oceanic lithosphere bend downward into the earth along the leading edges o...

Bismarck, Otto von

(Encyclopedia)Bismarck, Otto von bĭzˈmärk, Ger. ôˈtō fən bĭsˈmärk [key], 1815–98, German statesman, known as the Iron Chancellor. The Bismarckian era closed with the death of Emperor Frederick III. A ...

landslide

(Encyclopedia)landslide, rapid slipping of a mass of earth or rock from a higher elevation to a lower level under the influence of gravity and water lubrication. More specifically, rockslides are the rapid downhill...

Mountain Meadows

(Encyclopedia)Mountain Meadows, small valley in extreme SW Utah, where in 1857 a party of some 140 emigrants bound for California were massacred. It was a period when friction between Mormons and non-Mormons was ac...

Crédit Mobilier of America

(Encyclopedia)Crédit Mobilier of America krĕˈdĭt mōbĭlyāˈ, krādēˈ [key], ephemeral construction company, connected with the building of the Union Pacific RR and involved in one of the major financial sca...

Clausewitz, Karl von

(Encyclopedia)Clausewitz, Karl von kärl fən klouˈzəvĭts [key], 1780–1831, Prussian general and military strategist. Clausewitz was an original thinker most influenced by the Napoleonic wars in which he fough...

glacier

(Encyclopedia)glacier, moving mass of ice that survives year to year, formed by the compacting of snow into névé and then into granular ice and set in motion outward and downward by the force of gravity and the s...

Lanfranc

(Encyclopedia)Lanfranc lănˈfrăngk [key], d. 1089, Italian churchman and theologian, archbishop of Canterbury (1070–89), b. Pavia. At first educated in civil law, he turned to theology and became a pupil of Ber...

magnetic levitation

(Encyclopedia)magnetic levitation or maglev măgˈlĕv [key], support and often propulsion of objects or vehicles by the use of magnets. The magnets used in magnetic levitation suspend an object free of contact wit...

Beauregard, Pierre Gustave Toutant

(Encyclopedia)Beauregard, Pierre Gustave Toutant bōˈrĭgärd [key], 1818–93, Confederate general, b. St. Bernard parish, La., grad. West Point, 1838. As engineer on the staff of Winfield Scott in the Mexican Wa...