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Irazú

(Encyclopedia)Irazú ēräso͞oˈ [key], active volcano, c.11,260 ft (3,430 m) high, central Costa Rica, E of San José. A massive volcano, Irazú erupted in 1723, destroying Cartago, and since then it has erupted ...

Merapi, Mount

(Encyclopedia)Merapi, Mount məräˈpē [key] [Indonesian=mountain of fire], volcano, 9,551 ft (2,911 m) high, central Java, Indonesia, 20 mi (32 km) NNE of Yogyakarta. It is the most active of Indonesia's many vol...

asphalt

(Encyclopedia)asphalt ăsˈfôlt, –fălt [key], brownish-black substance used commonly in road making, roofing, and waterproofing. Chemically, it is a natural mixture of hydrocarbons. It varies in consistency fro...

Huaynaputina

(Encyclopedia)Huaynaputina, volcano, 15,912 ft (4,850 m) high, Moquegua region, S Peru, in the central Andes. A stratovolcano, it lies on the W rim of the Río Tambo canyon and has several ash cones within its crat...

Surtsey

(Encyclopedia)Surtsey, volcanic island, c.1.25 sq mi (3.2 sq km), S of Iceland in Vestmannaeyjar (Westman Islands). The island was formed by the eruption (Nov., 1963) of Sutur, an underwater volcano named for a gia...

phlogiston theory

(Encyclopedia)phlogiston theory flōjĭsˈtŏn [key], hypothesis regarding combustion. The theory, advanced by J. J. Becher late in the 17th cent. and extended and popularized by G. E. Stahl, postulates that in all...

volcano

(Encyclopedia)volcano, vents or fissures in the earth's crust through which gases, molten rock, or lava, and solid fragments are discharged. Their study is called volcanology. The term volcano is commonly applied b...

Columbia Plateau

(Encyclopedia)Columbia Plateau, physiographic region of North America, c.100,000 sq mi (259,000 sq km), NW United States, between the Rocky Mts. and the Cascade Range in Washington, Oregon, and Idaho. Most of the p...

Charlottesville

(Encyclopedia)Charlottesville shärˈlətsvĭl [key], city (2020 pop. 46,553), seat of Albemarle co., central Va., on the ...

Pelée

(Encyclopedia)Pelée pəlāˈ [key], volcano, 4,429 ft (1,350 m) high, on N Martinique, in the West Indies. On May 8, 1902, the day after the eruption of Soufrière on St. Vincent, Pelée also erupted, engulfing Sa...