A banded appearance.
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Gneiss itself, is a laminated metamorphic rock similar to granite.
Foliation is the layering of metamorphic rock. An example of foliation would be a rock called a Gneiss. On this rock, it is easily apparent to see the layers of rock that have formed.
Metamorphic rocks often have foliation. Schist is a common example.
No. The layering or foliation only occurs when there is a variation in the composition of the original rock. If the rock is homogeneous, then there will be no foliation.
Slate is certainly foliated and splits easily along this foliation surface. Gneisses frequently banded and this banding is also a foliation.
Foliation
Gneissic texture is used to identify the highest grade of metamorphic rock that still displays foliation. Granulite is the highest grade metamorphic rock, period, but does not display foliation due to the instability of sheet silicates.
Slaty foliation, is a type of parallel foliation consisting of fine-grained platy minerals. The direction of foliation is usually perpendicular to the direction of maximum stress.
Foliation is the arrangement of minerals in parallel layers.
The foliation in metamorphic minerals is always perpendicular to the direction of pressure. E.g. Vertical pressure is applied, the foliation will be horizontal, and vice-versa, the pressure is horizontal you get vertical foliation. From yahoo answers
Slaty foliation, is a type of parallel foliation consisting of fine-grained platy minerals. The direction of foliation is usually perpendicular to the direction of maximum stress.
Foliation is the layering of metamorphic rock. An example of foliation would be a rock called a Gneiss. On this rock, it is easily apparent to see the layers of rock that have formed.
Metamorphic rocks often have foliation. Schist is a common example.
With a good eye you maybe could see one but usually they do not exhibit a foliation.
Metamorphic foliation is layering in metamorphic rock. The layers can be very thin, or they can be a meter thick,
Slaty foliation- Parallel foliation of fine-grained platy minerals in a direction perpendicular to the direction of maximum stress (-Anonymous)
Gneissic textured rock.
No. The layering or foliation only occurs when there is a variation in the composition of the original rock. If the rock is homogeneous, then there will be no foliation.