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Baltic Shield

(Encyclopedia) Baltic Shield, the continental core of Europe, composed of Precambrian crystalline rock, the oldest of Europe. The tectonically stable region was not affected by the Caledonian,…

syenite

(Encyclopedia) syenitesyenitesīˈənīt [key], coarse-grained igneous rock, similar in appearance and composition to granite. Unlike granite, it contains little or no quartz. The chief minerals in…

Great Artesian Basin

(Encyclopedia) Great Artesian Basin, c.670,000 sq mi (1,735,300 sq km), between the Eastern Highlands and the Western Plateau, E central Australia, extending S from the Gulf of Carpentaria,…

Janesville

(Encyclopedia) Janesville, city (1990 pop. 52,133), seat of Rock co., S central Wis., on the Rock River; inc. 1853. It is an industrial and commercial center in a grain, dairy farm, and tobacco area…

Who, The

(Encyclopedia) Who, The, English rock music group formed in 1964. The members were Peter Dennis Blanford Townshend, 1945–, Chiswick, London, U.K…

Hearne, Samuel

(Encyclopedia) Hearne, SamuelHearne, Samuelhûrn [key], 1745–92, British fur trader, explorer in N Canada. He entered the British navy at the age of 11 and saw service in the naval battles of the…

Deep Impact

Director:Mimi LederWriters:Bruce Joel Rubin and Michael TolkinDirector of Photography:Dietrich LohmannEditor:David RosenbloomMusic:James HornerProduction Designer:Leslie DilleyProducers:David…

Ledyard, William

(Encyclopedia) Ledyard, WilliamLedyard, Williamlĕdˈyərd [key], 1738–81, American Revolutionary officer, b. Groton, Conn. In 1781, as commander of Fort Griswold (near Groton), he refused to surrender…

Willet, Marinus

(Encyclopedia) Willet, MarinusWillet, Marinusmərēˈnəs wĭlˈĭt [key], 1740–1830, American Revolutionary soldier, b. Jamaica, N.Y. In the French and Indian War he was (1758) a member of the expeditions…

sandstone

(Encyclopedia) sandstone, sedimentary rock formed by the cementing together of grains of sand. The usual cementing material in sandstone is calcium carbonate, iron oxides, or silica, and the hardness…