How Does The Rate At Which A Body Of Rock Is Deformed Affect Its Behavior??
How does the rate at which a body of rock is deformed affect its behavior? A rock deformed quickly is likely to exhibit brittle behavior. stretching. … Strain is the change in shape of a rock as a result of applied stress.
What factors affect the deformation of a rock quizlet?
The factors that affect the deformation of rock include temperature pressure rock type and time. What are the types of stresses that affect rocks? The three types of stress that cause deformation in rocks are tensional stress compressional stress and shear stress.
Under which of these conditions would a body of rock be more likely to exhibit plastic?
At the Earth’s surface rocks usually break quite quickly but deeper in the crust where temperatures and pressures are higher rocks are more likely to deform plastically. Sudden stress such as a hit with a hammer is more likely to make a rock break. Stress applied over time often leads to plastic deformation.
What happens to the crustal root of a mountain range as the mountains are slowly eroded away?
Mountain belts formed by convergent-margin tectonism may incorporate…. … What happens to the crustal root of a mountain range as the mountains are slowly eroded away? The crustal root of a mountain range rises out of the mantle. The formation of the basin and range province is associate with which process?
What structures form as a result of brittle deformation?
Faults. As rocks undergo brittle deformation they may produce cracks in the rocks. If no appreciable displacement has occurred along these cracks they are called joints. If appreciable displacement does occur they are referred to as faults.
What is rock deformation How might a rock body change during the formation?
Deformation is a rock’s reaction to stress which can cause a rock to change its shape or position most crustal deformation occurs along plate boundary. what is confining pressure. stress is applied uniformly in all directions does not change shape or orientation of rock body. (makes more compact rock)
What are the four factors that influence rock strength?
Factors that influence the strength of a rock and how it will deform include temperature confining pressure rock type and time.
How would a rock respond to stresses applied at depth?
the rock will snap back to nearly its original size and shape when the stress is removed. … increases with depth as the thickness of the overlying rock increases. Squeezes the materials in Earth’s crust which makes it stronger and thus harder to break.
Which type of stress tends to press the rocks towards each other?
Under what set of conditions is a rock most likely to break rather than bend?
At the Earth’s surface rocks usually break quite quickly but deeper in the crust where temperatures and pressures are higher rocks are more likely to deform plastically. Sudden stress such as a hit with a hammer is more likely to make a rock break. Stress applied over time often leads to plastic deformation. 2.
At what rate does this kind of mountain erosion occur?
In the 1960s the plate tectonics revolution explained how mountain building is driven by the horizontal movements of vast blocks of the lithosphere–the relatively cool and brittle part of Earth’s exterior.
What happens to the crustal root of a mountain range as the mountains are slowly eroded away quizlet?
What happens to the crustal root of a mountain range as the mountains are slowly eroded away? The crustal root rises out of the mantle.
What happens to the crustal root of a mountain?
When mountains form through the collision of lithospheric plates uplift of the Earth’s surface is accompanied by thickening of the crust and the buoyancy of these deep crustal roots (relative to the surrounding mantle) is thought to contribute to the support of mountain topography.
How are rocks in Earth’s crust deformed?
Rocks become deformed when the Earth’s crust is compressed or stretched. The forces needed to do this act over millions of years – deformation is a very slow process!
When a rock breaks it is called brittle deformation?
Brittle deformation refers to the breaking of chemical bonds which do not subsequently reform. The outcome of brittle deformation in rocks is analogous to that which is seen in broken plates i.e. fractures. Under an applied stress a rock will undergo brittle deformation depending on its rheology.
What is rock deformation explain different type of stresses which causes rocks to deform?
Stress causes rocks to deform meaning the rocks change size or shape. There are different kinds of stress that rocks experience and these determine how the rocks deform. Tensional stress is when rock is stretched apart. … Compressional stress is when rock is pressed together.
What is rock deformation quizlet?
Rock deformation. refers to the tilting bending or fracturing of a rock. this occurs when some force is applied to the rocks.
What is deformation list ways in which a rock body might change during deformation?
How might a rock body change during deformation? Compressional stress: differential stress that squeezes rock mass together. Tensional stress: differential stress that pulls apart or elongates a rock. Shear stress: differential stress that causes rock to shear movement of one part of a body past another.
How does temperature affect rock deformation?
Temperature is another factor affecting the deformation of a rock. Increasing the temperature can decrease the yield stress (the strength that stress needs to exceed for deformation to go from elastic to becoming permanent). Once this occurs the rock becomes more ductile and less susceptible to fracturing.
What affects rock strength?
The principal factors controlling the strength of solid rocks are: I) mineral composition structure and texture 2) bedding jointing and anisotropy 3) water content 4) state of stress in the rock mass.
How could a rock behaving as a ductile material become deformed and under what conditions will this behavior occur?
Deformation of Ductile Rocks
Folds result from compressional stresses or shear stresses acting over considerable time. Because the strain rate is low and/or the temperature is high rocks that we normally consider brittle can behave in a ductile manner resulting in such folds.
What does rock strength depend on?
Strength of a given rock type is strongly influenced by physical parameters such as temperature confining pressure fluid pressure and the length of time the stress is applied.
Why do rocks become stronger with depth in shallow levels of the crust?
“Rocks in the upper crust become STRONGER/WEAKER with depth because increasing confining pressure acts to hold rocks together and makes slipping along any fractures more difficult.”
Which type of differential stress shortens a rock body?
Why rock does not deform under confining stress?
Why don’t rocks deform under confining stress? The rock cannot move. … Compression squeezes rocks together causing rocks to break.
What kind of stress on the rocks happens when plates are pushed towards each other pulled away from each other or slide past each other?
Tensional stress happens when rocks are pulled away from each other compressional stress on the other hand happens when rocks are pushed towards each other. Shear stress however happens when rocks slide across each other in opposite direction the sliding rocks in this case do not hit each other.
What is the resulting strain produced by tensional stress on a rock?
Compression. What is the resulting strain produced by tensional stress on a rock? Lengthening and thinning of the rock.
How will you explain the stress and strain that rock undergoes?
Up to a point rocks undergo elastic deformation and will spring back to their original shape after the stress is removed. If more stress is applied the rock may deform in a ductile manner. If stress increases further the rock may fracture.
Why might rock bend rather than break?
Some rocks naturally tend to behave ductily when subjected to stress. … If instead the confining pressure is high (this would occur if the rocks were buried deep in the Earth) even the most “brittle” rocks bend rather than break.
How does stress occur in rocks?
Compression: Stress which causes rock to squeeze or push against other rock. Tension: Stress which occurs when rock pulls apart or gets longer. Shear Stress: Stress which occurs when tectonic plates move past each other causing rock to twist or change shape.
Why do some rocks break and others flow?
Erosion happens when rocks and sediments are picked up and moved to another place by ice water wind or gravity. Mechanical weathering physically breaks up rock. … Over time pieces of rock can split off a rock face and big boulders are broken into smaller rocks and gravel.
How rocks and mountains break apart?
How does rock uplift occur?
Just like sedimentary rocks metamorphic rocks can be forced to the Earth’s surface too. Sometimes forces act to pull sections of the Earth’s crust apart. … All this movement can cause rocks that were once underground to be brought up to the Earth’s surface. This process is called uplift.
How are erosion mountain ranges formed?
Thus erosion by reducing the weight of the mountain range actually accelerates tectonic processes beneath the mountains. Erosion-Formed Mountain Ranges are the type of mountain ranges do not form because of Earth’s internal activity but because of rock erosion or weathering. …
DEFORMATION OF ROCKS | Behavior of Rocks Under Different Types of Stress | Earth Science
Deformation of Rocks
Rock Deformation- Structural Geology-1