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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
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 type of metamorphic rock is composed of mineral grains arranged in parallel layers?
Foliated.
What is a type of metamorphic rock in which mineral grains grow and rearrange but do not form layers?
schist
When mineral grains flatten and line up in layers a metamorphic rock has a?
A schistose texture.
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.
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.
Is it true that foliated metamorphic rocks have mineral grains that are randomly placed?
No, foliated metamorphic rocks have mineral grains that are aligned in parallel layers or bands due to the pressure and temperature conditions during their formation. This alignment gives foliated rocks their characteristic layered appearance.
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 the parallel crystal arrangement of layers in metamorphic rock called?
The parallel crystal arrangement of layers in metamorphic rock is called foliation. Foliation is a common feature in rocks that have undergone intense heat and pressure, resulting in the alignment of mineral grains into distinct layers.
What are the characteristics of foliated and non-foliated metamorphic rocks?
Foliated metamorphic rocks have a layered or banded appearance due to alignment of mineral grains, exhibit strong cleavage, and are formed under directed pressure. Non-foliated metamorphic rocks do not have a layered structure, show more equidimensional mineral grains, lack cleavage, and are typically formed under contact metamorphism.
