【地球科学问题1.Manyrocksproducedbyco-查字典问答网
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  【地球科学问题1.Manyrocksproducedbycontactmetamorphismshowlittleornofoliationbecause:(a)verylittledeformationaccompaniesthemetamorphism.(b)thistypeofmetamorphismoccursatveryhighpressures(c)thistypeofmetamorphismoccu】

  地球科学问题

  1.Manyrocksproducedbycontactmetamorphismshowlittleornofoliationbecause:

  (a)verylittledeformationaccompaniesthemetamorphism.

  (b)thistypeofmetamorphismoccursatveryhighpressures

  (c)thistypeofmetamorphismoccursatverylowpressures

  (d)noneoftheoriginalmineralsrecrystallizedduringthemetamorphism.

  2.Regionalmetamorphismoccurswhen:

  (a)sedimentsareburiedtogreatdepths.

  (b)magmamovesupthroughtheearth’scrust,towardthesurface.

  (c)brittlerocksareintenselydeformedatveryhighpressures.

  (d)sedimentsaremeltedatveryhightemperatures.

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2019-05-0521:57
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廖亮

  第一题是c,成层的结构是高压下,压力梯降的反映,接触变质更多的是高温影响产生的重结晶.

  第二题是貌似也是c,只有a和d不能确定一定是区域变质.

2019-05-05 22:00:39
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