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Rocks that have undergone metamorphism, have been changed by heat and pressure, such that their mineral assemblage is changed. The micas are among the last of the minerals to crystallize, and are often used as samples to define the date of that metamorphism.
In general the metamorphosed rock will be more dense than the original. Compare marble and limestone. Marbles are about the least metamorphosed rock.
Where the rock has been completely melted, and no trace of their original structure remains, they are called plutonic.
What else can I help you with?
How does a metamorphic rock form from an igneous rock?
It gets under a lot of pressure underground and then changes. Metamorphic just means changing.
A metamorphic rock?
It is a rock that goes through a lot of heat or pressure to make a new rock.
When metamorphic rock changes to magma the magma rises and cools to become?
A metamorphic rock is formed by the elements, minor heat, and compression. When the metamorphic rock is melted by magma, this would indicate that the metamorphic rock is under the surface of the earth. If it rises and cools again you will have an extrusive igneous rock. In a lot of cases, this is metamorphic rock on the surface under the influence of lava. This would change the composition and it would not longer be metamorphic, but rather igneous.
Metamorphic rock?
This rock has been through a lot man. Mad pressure on it and sometimes heat too
Can a rock have high porosity but low permeability?
Yes, it is possible for a rock to have high porosity, meaning it has a lot of open spaces or pores, but low permeability, indicating that the pores are not well connected or that the rock's structure hinders the flow of fluids. As a result, while the rock can hold a lot of fluid within its pores, the fluid may not be able to flow easily through it.
How does sedimentary rock change to metamorphic rock?
metamorphic rocks get compacted and cemented together until it becomes sedimentary rocks. they can also get crystallized underwater into sedimentary rock. hope you find this helpful!!! :)when a rock is put under a lot of heat and pressure it morphs into a sedimentary rock.
What is slate formed by?
Slate is formed from the metamorphism of shale or mudstone. This process involves intense heat and pressure which causes the shale to recrystallize into a fine-grained, foliated rock with excellent cleavage properties.
What type of rock is usually present in areas with a lot of caves?
Limestone is the type of rock that is commonly found in areas with a lot of caves. Limestone is made of calcium carbonate, which is soluble in water. Over time, as rainwater seeps into the ground, it dissolves the limestone and creates openings and caves in the rock.
How long does it take for a metamorphic rock to turn into a igneous rock?
Sedimentary rock metamorphosis can occur very rapidly ( in geologic terms) as is the case with skarn, a contact metamorphic rock, or quite slowly as is the case with slate, which has proceeded through metamorphism in stages from mud to mudstone to shale to slate, a process taking millions of years.
How can sedimentry rock become metamorphic rock?
Well, first before the sediment can become to a metamorphic rock, it has to create into a sedimentary rock or an igneous rock, Then the rocks go under the ground and is under tons and tons of pressure, which fosters heat build up, and this causes them to change.
Can igneous rocks turn into metmorphic rocks and how?
Igneous rock can turn into metamorphic rock through exposure to heat and pressure. Pressures necessary to transform igneous rock to metamorphic rock are usually only found in areas of mountain building or incredibly deep burial, the metamorphism occurring in the alignment of the minerals which constitute the parent rock. Recrystallization can occur as well, even though the rock has not melted.
What is the major difference between igneous and metamorphic rocks?
igneous rocks started as melted lava and cooled to be rocks. Metamorphic rock started as a sedimentary rock, and was heated up and put under pressure to create the metamorphic rock. Classic example - igneous = obsidian. Metamorphic = marble (marble is limestone that's been heated and squeezed a lot).
