Under Which Of These Conditions Would A Body Of Rock Be More Likely To Exhibit Plastic Behavior?

As was mentioned before, the response of certain rocks to stress will vary depending on the temperature at which they are found. When temperatures are raised, behavior tends to become more plastic. When they are wet, certain rocks and sediments take on a more plastic-like consistency. The pace at which the stress is delivered is also an important consideration.

What happens when the elastic limit of a rock is reached?

  1. When the amount of external stress exerted on a rock approaches its elastic limit, the rock will begin to show signs of plastic deformation.
  2. When the load on the rock is relieved, a process called plastic deformation occurs in which the rock returns partly to its previous shape.
  3. 3.
  4. If the load on the rock is not relieved, cracks will form, and it will eventually break ( ultimate failure stress ).

What type of rocks form at high pressures and low temperatures?

Rocks of the Hornfels facies are formed under conditions of high pressure and low temperature. It is possible for a protolith to belong to any one of the three major forms of rock. In order to become an igneous rock, a metamorphic rock must first undergo the appropriate transformation. Melting The rock cycle is explained here. the transition from one sort of rock to another

What is the difference between elastic and plastic deformation?

  1. In the process of elastic deformation, the rock undergoes deformation in response to the application of stress and then reverts to its original shape when the tension is removed.
  2. According to Hooke’s Law, the ratio of the stress to the strain holds true for elastic deformation.
  3. 2.
  4. A rock will start to show signs of plastic deformation after the applied tension has reached the point when it has reached its elastic limit.

Which typically has greater porosity than the lithified rock?

The lithified rock that will eventually develop from unconsolidated sediment often has a lower porosity than the unconsolidated sediment did: True or False True When drilling a well, it is necessary to do it below the water table and into a ___________________. Only then will the well be able to perform its intended function. A. aquifer B. spring

Under what condition is a body of rock most likely to exhibit brittle behavior?

A rock that undergoes rapid deformation is likely to have brittle behavior.

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Which rock type is most likely to have been deposited in a high energy environment such as a very turbulent stream )?

The process of breaking down large boulders into smaller pieces is referred to as mechanical weathering. Which form of rock is most likely to have been deposited in an environment with a high level of energy, such as a stream with a great deal of turbulence? The mineral calcite predominates in all forms of limestone, including its most common form. True!

Which of the following occurs when rocks are pulled apart?

The stress increases as the rocks are dragged further apart. When placed under strain, rocks either stretch or fracture apart. At plate borders that are caused by divergent plate motion, the predominant form of stress is tension. Shear stress is the type of stress that occurs when there are parallel pressures that are travelling in opposite directions (figure 2).

Which of the following is most likely to result in brittle deformation?

When stress is given for a shorter amount of time, the material is more likely to undergo brittle deformation, but when stress is applied for a longer amount of time, the material is more likely to undergo ductile deformation.

What happens to rocks during plastic deformation?

Plastic deformation occurs when a rock, mineral, or other object is strained beyond the point where it can withstand the elastic strain (Fig. 1). Plastic deformation is a type of deformation that alters the shape of a solid in a way that is irreversible. This type of deformation occurs when the solid does not fail by fracture.

How does elastic deformation of rocks differ from brittle or plastic deformation?

Elastic deformation occurs when the tension is removed from the rock and the rock returns to its original shape. rock undergoes plastic deformation when, after the application of force, the rock does not go back to its original shape. fracture means that the rock has broken.

Which sedimentary rock would most likely be deposited in a very high energy stream?

In a conglomerate, the coarse-grained clasts are well rounded, which indicates that they were transported for a significant amount of time and were ultimately deposited in a high-energy environment that was capable of transporting the large clasts. In other words, the conglomerate was formed by a process that was capable of carrying the large clasts.

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Which rock type is deposited in the highest energy environment?

Rocks composed of sediments. A high-energy environment is one in which the water is rapidly moving and agitated, and is able to carry particles of large grain sizes; typically, this occurs in shallow lakes and seas as well as in rivers and deserts. High-energy environments can also be characterized by the presence of large amounts of sunlight.

Which rock would most likely be produced by heat and pressure?

Rocks that eventually become metamorphic started off as another form of rock but, as a result of pressure, heat, and time, they progressively changed into a different type of rock.

In which of the following conditions do blocks of rock break?

When subjected to sufficient force, rock will fracture, also known as break. The term ″joint″ is used to refer to a fracture that occurs when there is a block of rock that is still standing on either side of a fracture line, as seen in Figure 7.13. When the confining tension on an underlying granite is relieved, for instance, this might result in the formation of joints.

What happens to rocks under shear stress?

  1. Rock may undergo deformation, which includes tilting, breaking, and bending.
  2. Stress that causes one rock to squeeze or push against another rock is referred to as compression.
  3. The stress that develops as a result of rock pulling apart or becoming longer is referred to as tension.
  4. Shear stress is a type of stress that happens as tectonic plates move past one other, causing rock to twist or change shape as a result of the movement.

What happen to rocks in areas that are compressed?

It is impossible for the rock to change shape since it cannot move. This type of stress is known as restricting stress. Rocks are caused to fold or fracture as a result of compression, which causes rocks to become more compact (figure 1). At convergent plate borders, the type of stress that occurs most frequently is called compression.

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What causes plastic deformation?

Plastic deformation of nanostructured materials is brought on by grain boundary sliding, which causes atoms to hop across grain borders as a direct result of the movement of grain boundaries.

How does temperature affect rock deformation?

Another component that contributes to the deformation of a rock is the temperature of the rock. An increase in temperature can lead to a reduction in the yield stress (the strength that stress needs to exceed for deformation to go from elastic to becoming permanent). As soon as this takes place, the rock transforms into a more ductile state, making it less prone to breaking.

What causes rock deformation?

Rocks undergo deformation if the outer layer of the Earth’s crust is stretched or crushed. The forces that are necessary to achieve this act over millions of years; the process of deformation is a very gradual one!

Why do earthquakes occur only above the brittle ductile transition depth quizlet?

Why do earthquakes only take place at depths that are higher than the brittle-ductile transition? The rocks are too hot to touch lower down, where the transition is.

What’s the difference between a joint and a fault?

A fracture is considered to be a fault if the rocks on one side of the break move relative to the rocks on the other side of the break. When one side does not move in relation to the other, and when there are many additional fractures that have the same orientation, the fractures are referred to as joints.

Which of the following is a component of deformation?

The total displacement field for material moving inside an orogenic system is comprised of translation, strain, and rotation (Means, 1976), the three components of deformation that make up the deformation process. (A) The cube’s starting location, form, and orientation relative to a Cartesian coordinate frame

How is stress different from strain?

The application of force that is proportional to the size of the region it affects is referred to as stress. The alteration in form that takes place when rocks are subjected to stress is referred to as strain.

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