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A fractured surface--rough. A polished or worn surface--smooth.

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15y ago

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What is a sentence for gneiss?

I am trying to find out what the other two types of rock besides gneiss form the Matterhorn. Gneiss is a metamorphic rock. That's a nice piece of gneiss!


What is Gneiss composed of?

Gneiss is composed of mineral grains that are arranged into distinct layers or bands. The most common minerals found in gneiss include quartz, feldspar, and mica. The banding in gneiss is a result of intense heat and pressure during its formation, causing the minerals to segregate into layers.


Which feature would easily distinguish schist and gneiss from quartzite and marble?

The presence of visible minerals aligned in bands or layers would distinguish schist and gneiss from quartzite and marble. Schist and gneiss show foliation due to intense metamorphism, while quartzite and marble are more homogenous in texture.


How does gneiss differ from the rock it was formed?

They are both metamorphic rocks. One difference is the rocks they are formed from. Gneiss is formed from Feldspar and Quartz. Gneiss can also contain muscovite, biotite and hornblende. Quartzite is formed from sandstone. Also Gneiss is more intensely foliated than Quartzite. This can be seen in the bands formed in Gneiss, while quartzite has no bands. Pure quartzite is white, while Gneiss is grey or pink, with dark streaks.


When the metamorphic rock schist is heated and squeezed it forms what?

When schist is further heated and squeezed, it can form gneiss, another type of metamorphic rock. Gneiss is characterized by its banded texture and high-grade metamorphism.