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Why are some metamorphic rocks foliated but others lack folitation?
Wiki User
∙ 6y ago
Nonfoliated metamorphic rocks such as marble and quartzite derived their metamorphism more from heat than from directional pressure. Foliations form at right angles to intense directional pressures. Nonfoliated metamorphic rocks like quartzite and marble are mainly single-mineralic in composition, and would therefore not tend to display layering.
Wiki User
∙ 11y ago
Wiki User
∙ 14y agoBecause they might not go through the right amount of (extreme) heat and pressure, or they don't have different compositions separate to produce a series of alternating dark and light bands.
Wiki User
∙ 13y agoFoliation is a texture in metamorphic rocks caused by deformation (commonly shearing) which in turn causes the crystals within the rock to change shape and align. Metamorphic rocks that have developed due to high temperatures or pressures but without the associated large deformations or strains will not display foliation.
Wiki User
∙ 12y agoAnonymous
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What are the characteristics of foliated and non-foliated metamorphic rocks?
Foliated rocks are metamorphic rocks that look like they have layers or the appearance of layers. Non-foliated rocks are metamorphic rocks without any foliation.
When metamorphic rock has banded texture with minerals grains that are arranged in layers it is called?
Metamorphic rocks with a layered or banded look are referred to as foliated.
What are the two categories of metamorphic rocks?
Foliated--those exhibiting layering (gneiss, slate, schists), and non-foliated--without layers (marble, quartzite).
Metamorphic rocks that do not have distinct layers or bands?
non-foliated.
What do foliated and non-foliated rocks have in common?
They are both metamorphic rocks.
What are the characteristics of foliated and non-foliated metamorphic rocks?
Foliated rocks are metamorphic rocks that look like they have layers or the appearance of layers. Non-foliated rocks are metamorphic rocks without any foliation.
When metamorphic rock has banded texture with minerals grains that are arranged in layers it is called?
Metamorphic rocks with a layered or banded look are referred to as foliated.
How are foliated metamorphic rocks different from nonfoliated metamorphic rocks?
Foliated are made of interlocking crystals, non-foliated are not.
What are the two categories of metamorphic rocks?
Foliated--those exhibiting layering (gneiss, slate, schists), and non-foliated--without layers (marble, quartzite).
Metamorphic rocks that do not have distinct layers or bands?
non-foliated.
What do foliated and non-foliated rocks have in common?
They are both metamorphic rocks.
Classify metamorphic rocks as foliated or non-foliated?
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What is the term for a type of foliated metamorphic rock?
Schistose Structure metamorphic rocks are known as foliated metamorphic rock.
What are foliated metamorphic rocks?
Foliated rocks have layers in them. We often refer to the layers as Banding.
What are metamorphic rocks with grains arranged randomly said to be?
They are called foliated metamorphic rocks, and are said to exhibit foliation.
What rocks have foliated structure?
"Foliated" rocks are usually metamorphic rocks like phyllite, slate, schist, and gneiss.
Which type of rock is foliated?
metamorphic rocks
