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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.
What else can I help you with?
What are rocks that have visible layers and elongated mineral grains?
Rocks with visible layers and elongated mineral grains are called foliated rocks. These rocks form under high pressure and temperature conditions, causing minerals to align in layers or elongate in a specific direction. Examples include schist and gneiss.
A type of metamorphic rock in which mineral grains grow and rearrange but do not form layers?
Non-foliated metamorphic rock, such as marble or quartzite, is characterized by the absence of visible layering or banding. The mineral grains in these rocks recrystallize and grow in a uniform manner, without forming distinct layers like in foliated rocks. This type of metamorphism typically occurs under conditions of high pressure and temperature without the presence of directed stress.
What rock has parallel bands of dark and light mineral grains?
Gneiss is a type of rock that has parallel bands of dark and light mineral grains. These bands are a result of the rock being subjected to high temperatures and pressures during its formation, causing the minerals to align in distinct layers.
How is the size of the mineral grains affect by the rate at which molten rock material rock?
The slower the rate of cooling the larger the size of the crystals that can develop.
What do metamorphic rocks with a non-foliated texture show metamorphic changes involve?
Metamorphic rocks with a non-foliated texture show that the metamorphic changes involved did not result in the development of a preferred alignment of mineral grains. This indicates that the rocks were subjected to directed pressure or high temperatures without causing the minerals to align into layers. Examples of non-foliated rocks include marble and quartzite.
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
When mineral grains in a metamorphic rock do not form layers the rock has what texture?
no texture
What is a type of metamorphic rock in which mineral grains grow and rearrange but do not form layers?
schist
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 type of grains does metamorphic rock have?
Metamorphic rocks can have various types of minerals, such as quartz, feldspar, mica, and amphibole, which form grains within the rock. These grains can be elongated or flattened, depending on the degree of metamorphism the rock has undergone. The size, shape, and alignment of these grains provide valuable information about the rock's history and the conditions under which it formed.
What are rocks that have visible layers and elongated mineral grains?
Rocks with visible layers and elongated mineral grains are called foliated rocks. These rocks form under high pressure and temperature conditions, causing minerals to align in layers or elongate in a specific direction. Examples include schist and gneiss.
Can gneiss is formed. The mineral grains in granite are flattened under pressure.?
Yes, gneiss can be formed from granite through a process called metamorphism. When granite is subjected to high temperatures and pressures, the mineral grains can become flattened and reorient, resulting in the characteristic banding and foliation seen in gneiss. This transformation represents a change in the rock's texture and mineralogy due to the environmental conditions it experiences.
If you found a rock with flat mineral grains which rock would it be?
It is likely a type of metamorphic rock, such as schist or gneiss, which form under high temperature and pressure conditions leading to the alignment of mineral grains into flat layers.
