Columbia Encyclopedia

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serpentine

(Encyclopedia)serpentine sûrˈpəntēn, –tīn [key], hydrous silicate of magnesium. It occurs in crystalline form only as a pseudomorph having the form of some other mineral and is generally found in the form of...

reservoir

(Encyclopedia)reservoir rĕzˈəvôr, –vwär [key], storage tank or wholly or partly artificial lake for storing water. Building an embankment or dam to preserve a supply of water for irrigation is an ancient pra...

quartz

(Encyclopedia)quartz, one of the commonest of all rock-forming minerals and one of the most important constituents of the earth's crust. Chemically, it is silicon dioxide, SiO2. It occurs in crystals of the hexagon...

earth, in geology and astronomy

(Encyclopedia)CE5 A. Cross section of the earth, showing its shells B. Detailed cross section of the crust and upper mantle: The lithosphere consists of the hard rock in the crust and upper mantle, lying above t...

Gibraltar

(Encyclopedia)Gibraltar jĭbrôlˈtər [key], British overseas territory (2015 est. pop. 34,000), 2.5 sq mi (6.5 sq km), on a narrow, rocky peninsula extending into the Mediterranean Sea from SW Spain. Most of the ...

Abu-Simbel

(Encyclopedia)Abu-Simbel ĭpˈsämbo͞olˈ [key], village, S Egypt, on the Nile River. Its two temples were hewn (c.1250 b.c.) out of rock cliffs during the reign of Ramses II. To avoid the rising waters caused by ...

melon

(Encyclopedia)melon, fruit of Cucumis melo, a plant of the family Curcurbitaceae (gourd family) native to Asia and now cultivated extensively in warm regions. There are many varieties, differing in taste, color, an...

Meager, Mount

(Encyclopedia)Meager, Mount, volcano, 8,793 ft (2,680 m) high, SW British Columbia, Canada, 90 mi (150 km) N of Vancouver. It is the northernmost of the Cascade Range volcanoes and the second highest peak of the Mo...

Marmaduke, John Sappington

(Encyclopedia)Marmaduke, John Sappington märˈmədo͞okˌ [key], 1833–87, Confederate general in the American Civil War, b. Arrow Rock, Mo. He served in the expedition against the Mormons and in Western army pos...

Andromeda, in Greek mythology

(Encyclopedia)Andromeda ăndrŏmˈĭdə [key], in Greek mythology, princess of Ethiopia, daughter of King Cepheus, king of Ethiopia, and Cassiopeia. According to most legends Cassiopeia angered Poseidon by saying t...