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Palenque

(Encyclopedia)Palenque pälāngˈkĕ [key], ancient city of the Maya in Chiapas, S Mexico, in the Usumacinta Valley. Its architectural elegance, adapted to tropical and topographical conditions, was a high point in...

Cumberland Plateau

(Encyclopedia)Cumberland Plateau or Cumberland Mountains, southwestern division of the Appalachian Mt. system, extending northeast to southwest through parts of West Virginia, Virginia, Kentucky, and Tennessee into...

Acuña, Cristóbal de

(Encyclopedia)Acuña, Cristóbal de krēstōˈbäl dā ako͞oˈnyä [key], 1597–1676?, Spanish Jesuit missionary and explorer in South America, rector of the Jesuit college at Cuenca, Ecuador. In 1638 he was sent...

Santa Clara, city, United States

(Encyclopedia)Santa Clara sănˈtə klârˈə [key], city (1990 pop. 93,613), Santa Clara co., W Calif.; inc. 1852. Part of the Silicon Valley high-technology manufacturing complex, the city produces a variety of e...

Kish, ancient city, Mesopotamia

(Encyclopedia)Kish kĭsh [key], ancient city of Mesopotamia, in the Euphrates valley, 8 mi (12.9 km) E of Babylon and 12 mi (19 km) east of the modern city of Hillah, Iraq. It was occupied from very ancient times, ...

Webster-Ashburton Treaty

(Encyclopedia)Webster-Ashburton Treaty, Aug., 1842, agreement concluded by the United States, represented by Secretary of State Daniel Webster, and Great Britain, represented by Alexander Baring, 1st Baron Ashburto...

Sui

(Encyclopedia)Sui swā [key], dynasty of China that ruled from 581 to 618. This short-lived dynasty reunified China in 589 after 400 years of division and laid the foundation for further consolidation under the T'a...

São Francisco

(Encyclopedia)São Francisco souN frəsēshˈko͝o [key], river, c.1,800 mi (2,900 km) long, rising in the Serra de Canastra, SW Minas Gerais state, Brazil, and flowing northeast, then southeast through the sertão...

seafloor spreading

(Encyclopedia)CE5 Schematic model of the oceanic crust, showing seafloor spreading seafloor spreading, theory of lithospheric evolution that holds that the ocean floors are spreading outward from vast underwate...

Chaldaea

(Encyclopedia)Chaldaea or Chaldea both: kăldēˈə [key], properly the southernmost portion of the valley of the Tigris and the Euphrates rivers. Sometimes it is extended to include Babylonia and thus comprises al...