pressure cementing
41Cohesion (geology) — Cohesion is the component of shear strength of a rock or soil that is independent of interparticle friction. In soils, true cohesion is caused by one of three things: Electrostatic forces in stiff overconsolidated clays (which may be lost through …
42dating — I In geology and archaeology, the process of determining an object s or event s place within a chronological scheme. Scientists may use either relative dating, in which items are sequenced on the basis of stratigraphic clues (see stratigraphy) or …
43sedimentary rock — Rock formed at or near the Earth s surface by the accumulation and lithification of fragments of preexisting rocks or by precipitation from solution at normal surface temperatures. Sedimentary rocks can be formed only where sediments are… …
44MODERN TIMES – FROM THE 1880S TO THE EARLY 21ST CENTURY — introduction effects of anti jewish discrimination in russia pogroms and mass emigration german jewry racism and antisemitism The Economic Crisis of the Early 1930s In Soviet Russia after 1917 new types of social organization contribution to… …
45NEW YORK CITY — NEW YORK CITY, foremost city of the Western Hemisphere and largest urban Jewish community in history; pop. 7,771,730 (1970), est. Jewish pop. 1,836,000 (1968); metropolitan area 11,448,480 (1970), metropolitan area Jewish (1968), 2,381,000… …
46Breccia — (pronEng|ˈbrɛtʃiə, ˈbrɛʃiə, it. breach) is a rock composed of angular fragments of several minerals or rocks in a matrix, that is a cementing material, that may be similar or different in composition to the fragments. A breccia may have a variety …
47cell — cell1 cell like, adj. /sel/, n. 1. a small room, as in a convent or prison. 2. any of various small compartments or bounded areas forming part of a whole. 3. a small group acting as a unit within a larger organization: a local cell of the… …
48El Salvador — /el sal veuh dawr /; Sp. /el sahl vah dhawrdd / a republic in NW Central America. 5,661,827; 13,176 sq. mi. (34,125 sq. km). Cap.: San Salvador. Also called Salvador. * * * El Salvador Introduction El Salvador Background: El Salvador achieved… …
49tennis — /ten is/, n. a game played on a rectangular court by two players or two pairs of players equipped with rackets, in which a ball is driven back and forth over a low net that divides the court in half. Cf. lawn tennis. See illus. under racket2.… …
50General Councils — General Councils † Catholic Encyclopedia ► General Councils This subject will be treated under the following heads: ♦ Definition ♦ Classification ♦ Historical Sketch ♦ The Pope and General Councils ♦ Composition of …
