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Metamorphism


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Author Topic: Metamorphism  (Read 1458 times)
Rebecca
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« Reply #15 on: May 29, 2007, 11:37:45 pm »

Gneissic Mineral Banding
The layering in a rock in which bands or lenses of granular minerals (quartz and feldspar) alternate with bands or lenses in which platy (mica) or elongate (amphibole) minerals predominate.

      The most intense form of foliation is mineral banding. At the highest grades of metamorphism, minerals begin to segregate into separate bands. The micaceous minerals separate from the quartz and feldspars.

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