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diachronism |
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diachronism [daɪˈækrəˌnɪzəm] n (Earth Sciences / Geological Science) Geology the passage of a geological formation across time planes, as occurs when a marine sediment laid down by an advancing sea is noticeably younger in the direction of advancement diachronous adj diachronism, diachrony the comparative study of a development based on its history. — diachronic, diachronistic, diachronistical, adj. See also: Timethe study and description of the change or development in the structural systems of a language over a stated period of time. Also called historical linguistics. Cf. synchronic linguistics. — diachronic, adj. See also: LinguisticsHow to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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On the other hand, the Bt^sub 2^ generation overgrows Bt] and appears to be chemically and chronologically heterogeneous, suggesting that each grain grew in a slightly variable environment, probably diachronously. The total length of rifted margin was more than 25,000 km, suggesting a staggered climatic response to uplift as rifting progressed diachronously, somewhat like a zipper. Available geochronological data are too few to determine whether the peak metamorphism was attained coevally or diachronously in the Sebtides and in the Temsamane units, or whether there were only one or two subduction zones (Fig. |
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