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ultramarine
(Encyclopedia)ultramarine, blue pigment used chiefly as a coloring material and as a bluing agent. A double silicate of sodium and aluminum with some sulfur, it is prepared commercially from kaolin, sulfur, soda as...Magadi, Lake
(Encyclopedia)Magadi, Lake məgäˈdē [key], c.20 mi (30 km) long and 2 mi (3.2 km) wide, S Kenya, in the Great Rift Valley. Formed and constantly resupplied by volcanic springs, the lake has a thick crust of carb...Cerro Azul
(Encyclopedia)Cerro Azul, volcano, 12,428 ft (3,788 m) high, central Chile, in the Andes c.150 mi (240 km) S of Santiago. Also known as Quizapú after the large vent on the northern flank of the volcano, Cerro Azul...Augustine Island
(Encyclopedia)Augustine Island ôˈgəstēn, –tĭn; ôgŭsˈtĭn [key], unihabited volcanic island, S Alaska, in Kamishak Bay at mouth of Cook Inlet. The active Augustine (or St. Augustine) volcano, which forms t...Ibn Khalikan
(Encyclopedia)Ibn Khalikan ĭbn khăˈlēkăn [key] or Ahmad bin Muhammad al-Barmaki al-Irbili ash-Shafii, 1211–82, Arabic biographer, b. in Erbil, Iraq. Ibn Khallikan lived and served as a judge and scholar in M...Telica
(Encyclopedia)Telica, active volcano, 3,481 ft (1,061 m), León dept., W Nicaragua, in the Cordillera de los Maribizos, 19 mi (30 km) N of the town of León. An explosive stratovolcano, it has six overlapping cones...Syrian Desert
(Encyclopedia)Syrian Desert, Arabic Badiyat Ash Sham, arid wasteland, SW Asia, between the cultivated lands along the E Mediterranean coast and the fertile Euphrates River valley. It extends N from the Nafud Desert...Saint Helens, Mount
(Encyclopedia)Saint Helens, Mount, volcanic peak, 8,363 ft (2,549 m; 9,677 ft/2,950 m before its 1980 eruption) high, SW Wash., historically the most active volcano in the Cascade Range. Dormant since 1857, Mt. St....Hercules'-club
(Encyclopedia)Hercules'-club, common name for several small, thorny trees, chiefly the devil's-walking-stick of the family Aralaceae (ginseng family) and the prickly ash of the family Rutaceae (orange family). The ...Saint-Pierre town, Martinique
(Encyclopedia)Saint-Pierre săN pyĕr [key], town (1990 est. pop. 5,550), Martinique, West Indies. Founded by Esnambuc in 1635 and once the chief commercial city of the island, it was engulfed by a mass of flame, l...Browse by Subject
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