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what term describes the zone of contact metamorphism that surrounds an intrusive magma body?

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What Term Describes The Zone Of Contact Metamorphism That Surrounds An Intrusive Magma Body??

Contact metamorphism occurs adjacent to igneous intrusions and results from high temperatures associated with the igneous intrusion. Since only a small area surrounding the intrusion is heated by the magma, metamorphism is restricted to the zone surrounding the intrusion, called a metamorphic or contact aureole.Apr 12, 2018

What is the term of the zone of metamorphism associated with contact metamorphism?

Contact metamorphism is a static thermal metamorphism in the vicinity of hot intrusive igneous bodies, and metamorphic rock is formed within the zone of contact metamorphism—contact aureole.

What type of rock is formed in the zone of contact metamorphism?

Contact metamorphism produces non-foliated (rocks without any cleavage) rocks such as marble, quartzite, and hornfels. In the diagram above magma has pushed its way into layers of limestone, quartz sandstone and shale.

What kind of metamorphism takes place near the magma body?

Contact metamorphism
Contact metamorphism happens when a body of magma intrudes into the upper part of the crust. Heat is important in contact metamorphism, but pressure is not a key factor, so contact metamorphism produces non-foliated metamorphic rocks such as hornfels, marble, and quartzite.

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Which of the following best describes what contact metamorphism is?

Which of the following best describes the conditions of contact metamorphism? Pressures are fairly low, the rock is in the upper part of the crust, and the heat is supplied from a nearby magma body.

What is contact metamorphism also called?

Contact metamorphism is a type of metamorphism that occurs adjacent to intrusive igneous rocks due to temperature increases resulting from hot magma intrusion into the rock. Metamorphic contact rocks, also known as horns, are often fine-grained and do not show signs of strong deformation. …

What is regional metamorphism associated with?

Regional metamorphism is associated with the major events of Earth dynamics, and the vast majority of metamorphic rocks are so produced. … Most regionally metamorphosed rocks develop primarily in response to continent-continent collision and to collision between oceanic and continental plates.

What is a contact metamorphic rock?

Contact Metamorphism (often called thermal metamorphism) happens when rock is heated up by an intrusion of hot magma. In this photo, the dark grey rock is an intrusion (a sill) between layers of a paler grey limestone. Just above and below the intrusion, the limestone has been altered to form white marble.

Which metamorphic rock is formed by contact metamorphism of a shale?

hornfels
hornfels—hornfels are very hard rocks formed by contact metamorphism of shale, siltstone, or sandstone.

What rocks are formed by regional metamorphism?

Regionally metamorphosed rocks usually have a squashed, or foliated appearance – examples include slate, schist and gneiss (pronounced “nice”), formed by metamorphism of mudstones, and also marble which is formed by metamorphism of limestone.

What is contact and regional metamorphism?

Contact metamorphism is a type of metamorphism where rock minerals and texture are changed, mainly by heat, due to contact with magma. Regional metamorphism is a type of metamorphism where rock minerals and texture are changed by heat and pressure over a wide area or region.

Where does regional metamorphism occur?

As described above, regional metamorphism occurs when rocks are buried deep in the crust. This is commonly associated with convergent plate boundaries and the formation of mountain ranges. Because burial to 10 km to 20 km is required, the areas affected tend to be large.

What is another term for intrusive igneous rocks?

Intrusive rocks, also called plutonic rocks, cool slowly without ever reaching the surface. They have large crystals that are usually visible without a microscope.

What does the term Protolith mean?

« Back to Glossary Index. The rocks that existed before the changes that lead to a metamorphic rock, i.e. what rock would exist if the metamorphism was reversed. parent rock, parent rocks.

Which of the following best describes a condition of fault zone metamorphism?

Which of the following best describes a condition of fault-zone metamorphism? Heat is generated by shearing and mechanical movements along breaks. Depth is fairly shallow, but temperature and pressure are so high that the rocks begin to partially melt.

Where does contact metamorphism occur?

igneous intrusive rock
Contact metamorphism occurs in the vicinity of an igneous intrusive rock as a result of thermal effects of the hot magma.

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Which type of metamorphism is associated with volcanic lava contact?

Contact metamorphism occurs adjacent to igneous intrusions and results from high temperatures associated with the igneous intrusion. Since only a small area surrounding the intrusion is heated by the magma, metamorphism is restricted to the zone surrounding the intrusion, called a metamorphic or contact aureole.

What best differentiates intrusive and extrusive rocks?

The most obvious difference between extrusive rocks and intrusive rocks is crystal size. Because extrusive rocks cool quickly, they only have time to form very small crystals such as basalt or none at all. On the other hand, intrusive rocks grow larger crystals because they take longer to cool.

What are the 7 types of regional metamorphism?

Contact Facies Series (very low-P); Buchan or Abukuma Facies Series (low-P regional) ; Barrovian Facies Series (medium-P regional); Sanbagawa Facies Series (high-P, moderate-T); Franciscan Facies Series (high-P, low T).

Why is it called regional metamorphism?

Regional Metamorphism. Regional metamorphism is metamorphism that occurs over broad areas of the crust. Most regionally metamorphosed rocks occur in areas that have undergone deformation during an orogenic event resulting in mountain belts that have since been eroded to expose the metamorphic rocks.

How would you describe regional metamorphism?

A type of metamorphism in which the mineralogy and texture of rocks are changed over a wide area by deep burial and heating associated with the large-scale forces of plate tectonics.

What are the types of regional metamorphism?

There are many kinds of classification of regional metamorphic rocks, and they are usually divided into four types: (1) orogenic metamorphic rock, (2) ocean-floor metamorphic rock, (3) burial metamorphic rock, and (4) migmatite in terms of tectonics.

Where do regional and contact metamorphism occur?

Metamorphism is basically the process of forming a metamorphic rock. The main difference between contact and regional metamorphism is that contact metamorphism occurs in a small region, whereas regional metamorphism occurs in a wide area.

What is contact metamorphism quizlet?

Contact metamorphism occurs when the country rock is affected by heat from an intrusion. Igneous bodies are intrude at relatively shallow depth so contact metamorphism is described as high temperature, low pressure metamorphism. High temperatures lead to recrystallised, unfoliated rocks in an aureole. Metamorphic Grade.

What is an example of contact metamorphism?

An example of contact metamorphism is the metamorphic rock marble. Marble is created from limestone that has been subjected to heat. Regional metamorphism by contrast takes place over large areas and is high-grade metamorphism. … It is mostly a metamorphic rock called gneiss.

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What rock metamorphic rock is formed shale?

Slate
Slate is another common metamorphic rock that forms from shale. Limestone, a sedimentary rock, will change into the metamorphic rock marble if the right conditions are met.

Is a metamorphic rock formed from shale?

The metamorphic rock that is formed from shale is slate. Slate is a foliated metamorphic rock that is grey in color.

Which rock is formed from shale?

Shales that are subject to heat and pressure of metamorphism alter into a hard, fissile, metamorphic rock known as slate. With continued increase in metamorphic grade the sequence is phyllite, then schist and finally gneiss.

How is regional metamorphism formed?

Regional metamorphism occurs when rocks are buried deep in the crust. This is commonly associated with convergent plate boundaries and the formation of mountain ranges. Because burial to 10 km to 20 km is required, the areas affected tend to be large. Most regional metamorphism takes place within continental crust.

What is regional contact?

Metamorphism is the solid change in minerals and textures in a pre-existing rock (country rock) due to changing pressure / temperature conditions. Conversely, contact metamorphism usually occurs under higher temperature conditions associated with ignorant intrusions on a smaller scale. …

How does contact metamorphism differ from burial metamorphism and regional metamorphism?

Contact metamorphism occurs when rocks are heated by magma or lava. … Regional metamorphism is when rocks buried deep beneath the earth’s surface are changed by high temperature and pressure.

What is burial metamorphism?

Burial Metamorphism (Fig. 8.3): occurs when sedimentary rocks that had undergone diagenesis are buried even deeper. Diagenesis grades into burial metamorphism, a relatively mild type of metamorphism resulting from the heat and pressure exerted by overlying sediments and sedimentary rocks.

What type of metamorphism occurs in subduction zones?

Subduction zone metamorphism is characterized by a low temperature, high-ultrahigh pressure metamorphic path through the zeolite, prehnite-pumpellyite, blueschist, and eclogite facies stability zones of subducted oceanic crust.

What causes regional metamorphism quizlet?

What causes regional metamorphism? Pressure builds up in rock that is buried deep below other rock formations or when large pieces of the Earth’s crust collide with each other.

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