CLEAVAGE

tendency of many minerals to split along definite smooth planar surfaces determined by their crystal structure. The directions of these surfaces are related to weaknesses in the atomic structure of the mineral and are always parallel to a possible crystal face. The property of cleavage is useful in identifying a mineral species. The tendency for certain varieties of metamorphic and sedimentary rock to split along more or less smooth surfaces is sometimes referred to as rock cleavage. Flagstone, slate, and schist are noted for this property, which arises from the parallel alignment of fine, platy mineral grains, themselves displaying cleavage.

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The Columbia Encyclopedia, Sixth Edition Copyright© 2004, Columbia University Press. Licensed from Lernout & Hauspie Speech Products N.V. All rights reserved.

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Questia Books and Articles on: Cleavage
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books on: Cleavage  - 9784 results

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...1992, the class cleavage rebounded. Changes...of these two cleavages thus appear to...development of these cleavages. First, the class cleavage is generally...of the class cleavage from 1960 through...class and gender cleavages also has a significant...
...leftist. The second relevant cleavage in Brazil is represented by...rural-urban dimension. This cleavage seems to be, again, one...materialist electorate. In both cleavages, the Brazilian Social Democratic...Workers Party PT in the first cleavage--where socioeconomic concerns...
...principal types of cleavage: (1) ascriptive, or trait, cleavages, such as race or caste...arise. The concept of cleavage is thus not iden...concept of conflict; cleavages may lead to conflict, but a cleavage need not always be...
cates of division had by no means abandoned their purpose of establishing a cleavage between the different parts of the State. With the exception of an occasional reference by way of disapproval of past procedure...
...imbroglio an aggravation of the CARICOM crisis ensued, with a deterioration of relations between Trinidad and Barbados and a clear cleavage between Guyana and the "leading trio" Seaga of Jamaica, Adams of Barbados, and Charles of Dominica who were publicly accused...
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journal articles on: Cleavage  - 1574 results

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...to China: Political Cleavages, Electoral Dynamics...is the lines of social cleavage that have helped to shape...significant political cleavages that have shaped the...the center-periphery cleavage in the 1980s, during...
...Welfare State: Institutions, Social Cleavages, and Orientations. by Julia S. OConnor...Welfare State: Institutions, Social Cleavages, and Orientations. Stanford: Stanford...framework relating to orientations, social cleavages, and political institutions that unites...
...opposite effects on the cleavage at NE and on the cleavages at TCl and TC2 in...linkage between these cleavages and ribosomal action...Selection of cleavage sites: We have...Interestingly, new cleavages as well as the cleavage at NE were introduced...
...there is rarely any cleavage of note among the top...indistinguishable. Whatever cleavage exists is most pronounced...were no substantial cleavages among these groups in...December 1994). Cleavages were usually less than...there was hardly any cleavage at all by ethnic descent...
...democracies. 1.2. Social Cleavages Social cleavage approaches to electoral...relationships (1) between social cleavages and cleavage-type volatilities using...provinces with stronger social cleavages have smaller cleavage-type volatilities (left...
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magazine articles on: Cleavage  - 458 results

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...When Should a Woman Stop Showing Her Cleavage?" Wonders Annalisa Barbieri. by Annalisa...what age should a woman stop showing her cleavage? Though the answer should be "Whenever...away. You see women who have "used" cleavage all their lives and cant let go of it...
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newspaper articles on: Cleavage  - 3168 results

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...illusions that my impressive cleavage played a part in that. Yet...hated, too, what my mighty cleavage represented. I didnt want...against women who flaunted their cleavages. They were bound to disappear...somewhat breathtaking 32E, cleavage has never done me any harm...
...Cups, Magic Foam. as M S Launches a Cleavage-Boosting Bra, How Do Its Rivals Fare...effective. The bra gave me an eye-popping cleavage and was surprisingly comfortable. However...breast. Despite an impressively lifted cleavage I still didnt feel it fitted as securely...
...You, Yes You. and All Because of Your Cleavage Apparently. Byline: By MOLLY WATSON...Wonderbra, we now have to co-ordinate our cleavage as well. From next week a series of...just to achieve Wonderbras trademark cleavage, but to create different effects, different...
Bob Shields UPFRONT AND OFF THE LEASH; the Cleavage by Any Other Name. by Bob Shields TELL me why...one of the ugliest names? Yes, were talking cleavage here. And as National Cleavage Day becomes a distant mammary, surely we can...
...time. First, exfoliate the cleavage with a gentle facial scrub...improve uneven skin tone in the cleavage area. Aesthera PPX laser...pay the price with crinkly cleavages before their time, warns...youll have a naturally glowing cleavage, minus the dehydration effects...
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encyclopedia articles on: Cleavage  - 31 results

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CLEAVAGE tendency of many minerals to split along...possible crystal face. The property of cleavage is useful in identifying a mineral species...surfaces is sometimes referred to as rock cleavage. Flagstone, slate, and schist are noted...
...layers; this characteristically regular and planar cleavage is called slaty cleavage. In the formation of slate, pressure causes...source of the pressure, and the planes of easy cleavage are also at right angles to the source of the...
...unstable. They are produced by homolytic cleavage of a covalent bond (see chemical bond...electrons making up the bond. The homolytic cleavage of a hydrogen molecule, H 2 , produces...from a chlorine molecule. Homolytic cleavage of the carbon-bromine bond in methyl...
...rapid series of cell divisions called cleavage, or segmentation (see mitosis ). Each...developmental patterns. In a typical animal, cleavage proceeds in the following pattern. Early...which encloses the blastocoel, or cleavage cavity. The cells divide more rapidly...
...depends on hardness and resistance to cleavage or fracture. The physical properties...hardness, presence or absence of cleavage, type of fracture (conchoidal, even, or uneven) in stones without cleavage, specific gravity, color, streak...
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