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pyroclastic flow

(Encyclopedia)pyroclastic flow, turbulent, fluidized mixture of rock, volcanic ash, and hot gas that moves like an avalanche away from a volcanic eruption. A pyroclastic flow may contain a mix of rock fragments ran...

Herskovits, Melville Jean

(Encyclopedia)Herskovits, Melville Jean hûrsˈkəvĭts [key], 1895–1963, American anthropologist, b. Bellefontaine, Ohio; educated at the Univ. of Chicago (Ph.B., 1920) and Columbia (Ph.D., 1923). After teaching...

Store Bælt and Lille Bælt

(Encyclopedia)Store Bælt lĭlˈə [key] [Great Belt and Little Belt], two shallow straits, S Denmark, connecting the Kattegat with the Baltic Sea. The Store Bælt, c.40 mi (60 km) long and from 10 to 20 mi (16–3...

Calais

(Encyclopedia)Calais kälāˈ [key], city, Pas-de-Calais dept., N France, in Picardy, on the Straits of Dov...

pencil

(Encyclopedia)pencil, pointed implement used in writing or drawing to apply graphite or a similar colored solid to any surface, especially paper. From prehistoric times lumps of colored earth or chalk were used as ...

Pinckney, Thomas

(Encyclopedia)Pinckney, Thomas, 1750–1828, American political leader and diplomat, b. Charleston, S.C.; brother of C. C. Pinckney and cousin of Charles Pinckney. At the outbreak of the American Revolution he join...

Whitby, town, England

(Encyclopedia)Whitby, town, Scarborough, North Yorkshire, N England, at the mouth of the Esk. It is a port and resort whose primary industries are fishing and tourism. Jet is found locally, and jewelry and ornament...

celestial pole

(Encyclopedia)celestial pole, one of the two points at which the earth's axis of rotation intersects the celestial sphere. The celestial pole is important as a reference point in the equatorial coordinate system; t...

Geneva, canton and city, Switzerland

(Encyclopedia)Geneva jənēˈvə [key], Fr. Genève, canton, 109 sq mi (282 sq km), SW Switzerland, surroun...

seaweed

(Encyclopedia)seaweed, name commonly used for the multicellular marine algae. Simpler forms, consisting of one cell (e.g., the diatom) or of a few cells, are not generally called seaweeds; these tiny plants help to...