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This may be due to the overburden load, which is essentially the weight of all the material above the layer of minerals in question squashing them flat. Or it may be due to deformation caused by the movements of tectonic plates which often causes a form of deformation known as shearing where two things slide past each other. When this occurs in ductile rock masses, it acts to flatten and rotate mineral grains so that their long axis is parallel to the shear plane.
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What are rocks that have visible layers and elongated mineral grains?
Maybe Sedimentary Rocks?
What do metamorphic rocks with a non-foliated texture show metamorphic changes involve?
mineral grains arranging into layers.
A type of metamorphic rock in which mineral grains grow and rearrange but do not form layers?
Foliated is the general descriptive term used to describe the layering or banding of metamorphic rock.
Does metamorphic rock have layers?
Not exactly. Some metamorphic rocks have foliation, which can appear similar to the layers of sedimentary rock. Foliation develops from mineral grains being oriented by pressure, rather than the deposition of layers.
What is a mineral grains?
Mineral grains are crystals or pieces of crystals that vary widely in chemicalcomposition
What type of grains does metamorphic rock have?
Metamorphic rock may have coarse, flattened, or aligned mineral grains.
A mineral that can be flattened without breaking?
rutherfordium
Can the mineral grains in a metamorphic rock be flattened?
Yes, and they often are, and appear as foliations.
What is a banded mineral?
A banded mineral is a mineral that has grains that are arranged in a particular pattern of flat layers or forms swirls.
When a mineral grains in a metamorphic rock do not form layers the rock has a?
no texture
What are rocks that have visible layers and elongated mineral grains?
Maybe Sedimentary Rocks?
When mineral grains in a metamorphic rock do not form layers the rock has what texture?
no texture
What type of metamorphic rock is composed of mineral grains arranged in parallel layers?
Foliated.
When mineral grains flatten and line up in layers a metamorphic rock has a?
A schistose texture.
What is a type of metamorphic rock in which mineral grains grow and rearrange but do not form layers?
schist
What do metamorphic rocks with a non-foliated texture show metamorphic changes involve?
mineral grains arranging into layers.
Metamorphic rocks such as marble and quartzite are said to be what because their mineral grains are not arranged in parallel layers or bands?
Nonfoliated
