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chalk
(Encyclopedia)chalk, mineral of calcium carbonate, similar in composition to limestone, but softer. It is characteristically a marine formation and sometimes occurs in great thickness; the chief constituents of the...Great Basin
(Encyclopedia)Great Basin, semiarid, N section of the Basin and Range province, the intermontane plateau region of W United States and N Mexico. Lying mostly in Nevada and extending into California, Oregon, Idaho, ...granite
(Encyclopedia)granite, coarse-grained igneous rock of even texture and light color, composed chiefly of quartz and feldspars. It usually contains small quantities of mica or hornblende, and minor accessory minerals...Chamberlin, Thomas Chrowder
(Encyclopedia)Chamberlin, Thomas Chrowder, 1843–1928, American geologist, b. Mattoon, Ill., grad. Beloit College, 1866. He was professor of geology at Beloit (1873–82), president of the Univ. of Wisconsin (1887...Spectral Classes for Main Sequence Stars (table)
(Encyclopedia)Characteristics of Spectral Classes for Main Sequence Stars ...nominalism
(Encyclopedia)nominalism, in philosophy, a theory of the relation between universals and particulars. Nominalism gained its name in the Middle Ages, when it was contrasted with realism. The problem arises because i...Major Planets of the Solar System (table)
(Encyclopedia)Major Planets of the Solar System ...Hereditary Western European Titles of Nobility (table)
(Encyclopedia)HEREDITARY WESTERN EUROPEAN TITLES OF NOBILITY ...Popes of the Roman Catholic Church (table)
(Encyclopedia)Popes of the Roman Catholic ChurchIn the following list, the date of election, rather than of consecration, is given. Before St. Victor I (189), dates may err by one year. Antipopes—i.e., those men...Sites of the Modern Olympic Games (table)
(Encyclopedia)Sites of the Modern Olympic Games Summer Games Winter Games ...Browse by Subject
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