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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…pumice
(Encyclopedia) pumicepumicepŭmˈĭs [key], volcanic glass formed by the solidification of lava that is permeated with gas bubbles. Usually found at the surface of a lava flow, it is colorless or light…Lassen Volcanic National Park
(Encyclopedia) Lassen Volcanic National Park, 106,372 acres (43,081 hectares), N Calif., at the southern end of the Cascade Range. Proclaimed as Lassen Peak and Cinder Cone national monuments in 1907…Newberry National Volcanic Monument
(Encyclopedia) Newberry National Volcanic Monument: see National Parks and Monuments (table)national parks and monuments (table).Aso-san
(Encyclopedia) Aso-sanAso-sanäˈsō-sän [key] or Mount Aso, volcanic mountain, central Kyushu, Japan. Aso-san is topped by one of the world's largest calderas (circumference 75 mi/121 km) that contains…Umnak
(Encyclopedia) UmnakUmnak&oomacr;mˈnăk [key], island, c.83 mi (134 km) long, off SW Alaska, one of the largest of the Aleutian Islands. Its two lobes, connected by an isthmus, are marked by…Sakurajima
(Encyclopedia) SakurajimaSakurajimasäk&oomacr;ˈräˈjĭmä [key], peninsula, Kagoshima prefecture, S Kyushu, Japan, in Kagoshima Bay opposite Kagoshima. Formerly an island, Sakurajima became a…Phlegraean Fields
(Encyclopedia) Phlegraean FieldsPhlegraean Fieldsflĭgrēˈən [key], Ital. Campi Flegrei, fertile volcanic region, Campania, S Italy, along the Tyrrhenian Sea between Pozzuoli and Naples. It is named…Huila, Nevado del
(Encyclopedia) Huila, Nevado delHuila, Nevado delnāväˈdō dĕl hwēˈlä [key], snow-capped volcanic mountain, 17,594 ft (5,364 m) high, on the Huila-Tolima-Cauca dept. border, S central Colombia, in the…Revillagigedo Islands
(Encyclopedia) Revillagigedo Islands or Revillagigedo ArchipelagoRevillagigedo Islandsrāvēˈyähēhāˈᵺō [key], volcanic island group in the Pacific Ocean, c.450 mi (720 km) W of Colima state and S of…Trending
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