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Contact and regional are terms used to describe two different types of metamorphic rocks. Contact metamorphism occurs when rocks are heated by nearby molten magma, leading to localized changes in mineralogy and texture. Regional metamorphism, on the other hand, involves larger-scale alterations due to high pressure and temperature over broad areas, often associated with tectonic processes like mountain building. Both types of metamorphism result in the formation of metamorphic rocks, which exhibit distinct characteristics from their parent rocks.
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On on what basis can metamorphic rocks be identified?
Metamorphic rocks can be identified if the rock is foliated or nonfoliated, foliating type, type of metamorphism (contact/regional), and by probable original rock. :)
What rocks are formed by changes in heat and pressure or the pressure of hot watery fluids?
Metamorphic Rocks are formed two ways: Regional Metamorphism Contact Metamorphism In regional, two plates collide and through pressure and friction to change igneous rock to metamorphic. In contact (more familiar to me) lava (hot liquid?) contacts any type of rock and doesn't not melt but sorta loosens it up so the crystals inside can rearrange.
Which type of metamorphosis makes non-foliated rocks?
Contact metamorphism does not often produce the foliation caused by regional metamorphism
What are the 4 types of metamorphism?
contact metamorphism, regional metamorphism, dynamic metamorphism
What type of rock is formed exclusively from contact metamorphism?
Hornfels is a type of rock that is formed exclusively from contact metamorphism. It is typically fine-grained and formed when existing rocks are subjected to high temperatures and pressures from nearby magma intrusions.
On on what basis can metamorphic rocks be identified?
Metamorphic rocks can be identified if the rock is foliated or nonfoliated, foliating type, type of metamorphism (contact/regional), and by probable original rock. :)
What is the difference between regional and contact metamorphose?
Contact metamorphism is a type of metamorphismwhere rock minerals and texture are changed, mainly by heat, due to contact with magma.
What are two things a metamorphic rock can d changed into?
regional and contact
Is gneiss rock contact or regional metamorphism?
whatever the f*** it is, nobody gives a darn
Which one is not a type of metamorphism regional contact hydrothermal or chemical?
chemical
What is the structure of a quartzite rock?
Quartizite is a metemorphic rock that is either regional or contact. It is made when lava rises to the earths crust, and heats the sedimentatry rock around it.
What are the two types metamorphic rock?
The two groups of metamorphic rock are foliated and nonfoliated. Metamorphic rocks can also be classified as contact and regional.
What type of metamorphism contact or regional would result in a schist explain your choice?
Regional metamorphism would result in the formation of schist. Schist is a metamorphic rock that forms under high pressure and temperature conditions over a large area, which is characteristic of regional metamorphism. This process causes the original minerals in the rock to recrystallize into new minerals, giving schist its foliated texture.
What is the difference between regional and contact metamorphism?
Regional metamorphism is the creation of metamorphic rock from large geographically significant processes like plate tectonics. Contact metamorphism is the creation of metamorphic rock from the proximity of an existing rock to a heat source provided by a plutonic intrusion.
What two geological processes are involved in changing sedimentary rock to a metamorphic rock?
The two processes resulting from sedimentary into metamorphic rock are known as contact metamorphism and regional metamorphism. Regional metamorphism most notably involves two tectonic plates colliding, while contact metamorphism occurs due to the intrusion of magma.
Which type of metamorphism affects the greatest volumes of rock?
Regional metamorphism affects the greatest volumes of rock. This type of metamorphism occurs over a large area and at significant depths within the Earth's crust, leading to the alteration of extensive rock formations.
Why are metamorphic rocks formed by contact metamorphism usually not as dense as those formed by reg?
Because in contact the rock actually comes in contact with magma, this joins with the rock, so when it cools and become igneous rock, it's denser. In regular, or regional, the rock is formed from intense heat and pressure, but does not actually come in contact with magma.
