undulose extinction

A Dictionary of Earth Sciences | 1999 | 326 words | Copyright

undulose extinction In optical mineralogy, the irregular or wavy extinction seen in thin sections of mineral grains (e.g. quartz) on rotation of the stage. Different parts of the grain go into extinction in different orientations. The phenomenon is thought to result from strain, which may modify crystal orientation slightly.

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AILSA ALLABY and MICHAEL ALLABY. "undulose extinction." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 28 May. 2012 <http://www.encyclopedia.com>.

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AILSA ALLABY and MICHAEL ALLABY. "undulose extinction." A Dictionary of Earth Sciences. 1999. Retrieved May 28, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-unduloseextinction.html

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