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2021-05-14

What would be the result of a collision between continental plates in which one plate is forced down toward the heat of the mantle?

What would be the result of a collision between continental plates in which one plate is forced down toward the heat of the mantle?

As it does so, the plate that is forced down (subducted) releases water into the upper mantle which lowers the pressure enough to melt the rock. Localized regions of magma form in the mantle near subduction zones. The mantle can then rise and create volcanoes.

Which plate movement can result in the formation of sedimentary rocks?

They may form at all types of plate boundaries, but the thickest sedimentary rock accumulations occur at convergent plate boundaries. Fossils are associated with sedimentary rocks.

What happens when the metamorphic rock melt?

Metamorphic rock is rock that has changed from one type of rock into another. If the rock melted, the process would result in igneous, not metamorphic rock. “Metamorphism” of rock causes the texture and/or mineral composition to change. New textures are formed from a process called recrystallization.

Which type of plate boundary is associated with regional metamorphism?

convergent plate boundaries

What is the relationship of metamorphism and plate tectonics?

Metamorphic rocks result from the forces active during plate tectonic processes. The collision of plates, subduction, and the sliding of plates along transform faults create differential stress, friction, shearing, compressive stress, folding, faulting, and increased heat flow.

What is the difference between regional and contact metamorphism?

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. ..

What are two similarities and two differences between contact and regional metamorphic rock formation?

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

What are the 2 types of metamorphism?

There are two main types of metamorphism:

  • Contact metamorphism—occurs when magma contacts a rock, changing it by extreme heat (Figure 4.14).
  • Regional metamorphism—occurs when great masses of rock change over a wide area due to pressure exerted on rocks at plate boundaries.

What happens during regional metamorphism?

Regional metamorphism is caused by large geologic processes such as mountain-building. These rocks when exposed to the surface show the unbelievable pressure that cause the rocks to be bent and broken by the mountain building process. Regional metamorphism usually produces foliated rocks such as gneiss and schist.

What are the characteristics of regional metamorphism?

Regional metamorphism: Changes in enormous quantities of rock over a wide area caused by the extreme pressure from overlying rock or from compression caused by geologic processes. Deep burial exposes the rock to high temperatures.

What is an example of 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 the main factor that affects a regional metamorphism?

Temperature, hydrostatic pressure, and shearing stress, together with the chemical activity of percolating pore fluids, are the major physical variables governing the process of regional metamorphism.

What are the two main sources of heat for metamorphism?

The second source of heat is from intrusive bodies of magma, such as batholiths. As these bodies cool they release heat to the surrounding country rock, leading to metamorphism….

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What are the three main types of metamorphism?

Three types of metamorphism exist: contact, dynamic, and regional. Metamorphism produced with increasing pressure and temperature conditions is known as prograde metamorphism.

What is the lowest type of metamorphism?

Low-grade metamorphism takes place at temperatures between about 200 to 320oC, and relatively low pressure. Low grade metamorphic rocks are generally characterized by an abundance of hydrous minerals

What is another name for contact metamorphism?

If the transformation is brought about mainly by heat, it is called contact metamorphism; if brought about by both heat and pressure, it is known as dynamothermal or regional metamorphism.

What type of rock is made from heat and pressure?

Metamorphic rocks

What are the five characteristics of a rock?

What are the 6 characteristics of a rock? These include color, crystal form, hardness, density, luster, and cleavage.

What is the importance of metamorphic rocks?

Metamorphic rocks have been on Earth for millions of years. They can be different shapes, sizes, and colors. Metamorphic rocks are used to make buildings, jewelry, powders, and other things. They are an important part of our world.

Is Clay a metamorphic rock?

Low grade metamorphic rocks tend to characterized by an abundance of hydrous minerals, minerals that contain water within their crystal structure. Examples of low grade hydrous minerals include clay, serpentine, and chlorite.

What kind of rock is formed by the process of Lithification?

Sedimentary rocks are formed on or near the Earth’s surface, in contrast to metamorphic and igneous rocks, which are formed deep within the Earth. The most important geological processes that lead to the creation of sedimentary rocks are erosion, weathering, dissolution, precipitation, and lithification.

What is the effect of heat and pressure in rocks?

heat, pressure increases with depth. This pressure can actually squeeze the spaces out of the minerals within the rock. This makes the rocks denser. The heat and pressure together cause the rock to flow instead of break or fracture

What type of rock is shale?

sedimentary rocks