κατάκλαση
English translation: cataclasis
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| 14:43 Dec 17, 2005 |
| Greek to English translations [PRO] Science - Geology | |||||||
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|  Selected response from: Vicky Papaprodromou Greece Local time: 15:40 | ||||||
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| 5 +8 | cataclasis |
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Answers
2 mins confidence: 
peer agreement (net): +8
peer agreement (net): +8| κατάκλαση cataclasis Explanation: http://www.tiscali.co.uk/reference/dictionaries/difficultwor... -------------------------------------------------- Note added at 2 mins (2005-12-17 14:46:38 GMT) -------------------------------------------------- http://www.google.com.gr/search?hl=el&q=cataclasis&meta= -------------------------------------------------- Note added at 38 mins (2005-12-17 15:21:53 GMT) -------------------------------------------------- metamorphism mineralogical and structural adjustments of solid rocks to physical and chemical conditions differing from those under which the rocks originally formed. Changes produced by surface conditions such as compaction are usually excluded. The most important agents of metamorphism include temperature, pressure, and stress. Equally as significant are changes in chemical environment that result in two metamorphic processes: (1) mechanical dislocation where a rock is deformed, especially as a consequence of differential stress; and (2) chemical recrystallization where a mineral assemblage becomes out of equilibrium due to temperature and pressure changes and a new mineral assemblage forms. Three types of metamorphism may occur depending on the relative effect of mechanical and chemical changes. Dynamic metamorphism, or cataclasis, results mainly from mechanical deformation with little long-term temperature change. Textures produced by such adjustments range from breccias composed of angular, shattered rock fragments to very fine-grained, granulated or powdered rocks with obvious foliation and lineation. Large, pre-existing mineral grains may be deformed as a result of stress. From Encyclopaedia Britannica 2006 |
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