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gneiss

(Encyclopedia) gneissgneissnīs [key], coarse-grained, imperfectly foliated, or layered, metamorphic rock. Gneiss is characterized by alternating light and dark bands differing in mineral composition…

Saint Helier

(Encyclopedia) Saint HelierSaint Heliersānt hĕlˈyər, Fr. săNtālyāˈ [key], town (1991 pop. 24,941), capital of Jersey, Channel Islands, Great Britain, on St. Aubin's Bay. The administrative and…

Ozarks, the

(Encyclopedia) Ozarks, the, or Ozark Plateau, upland region, actually a dissected plateau, c.50,000 sq mi (129,500 sq km), chiefly in S Mo. and N Ark., but partly in Oklahoma and Kansas, between the…

Selkirk, town, Canada

(Encyclopedia) Selkirk, town (1991 pop. 9,815), SE Man., Canada, on the Red River. Just S of Lake Winnipeg, it is a port for products from N Manitoba. There are steel mills, foundries, and shipyards…

The Nature of Volcanoes

Volcanoes are built by the accumulation of their own eruptive products—lava, bombs (crusted over ash flows), and tephra (airborne ash and dust). A volcano is most commonly a conical hill or mountain…

hematite

(Encyclopedia) hematitehematitehĕmˈətīt [key], mineral, an oxide of iron, Fe2O3, containing about 70% metal, occurring in nature in red to reddish-brown earthy masses and in steel-gray to black…

cardinal, in zoology

(Encyclopedia) cardinal or redbird, common name for a North American songbird of the family Fringillidae (New World finch family). In the eastern cardinal, Richmondena cardinalis, the male is bright…

brazilwood

(Encyclopedia) brazilwood, common name for several trees of the family Leguminosae (pulse family) whose wood yields a red dye. The dye has largely been replaced by synthetic dyes for fabrics, but it…

Wright, Harry

(Encyclopedia) Wright, Harry (Wiliam Henry Wright), 1835–95, English-American baseball player and manager, b. Sheffield, England. His father, a professional cricket player, moved the family to New…

color

(Encyclopedia) color, effect produced on the eye and its associated nerves by light waves of different wavelength or frequency. Light transmitted from an object to the eye stimulates the different…