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The three types of stress that act on Earth's rocks are compression, tension, and A. tension. B. shale. C. tephra. D. shear.
The three types of stress that act on Earth's rock are compression, tension and shear. Letter D is the answer. Compression Stress Compression stress = squeezes rocks. This is the most common stress. [ Rocks squeezing together where plates are moving toward one another causes them to fold or break. These are called faults. Faults are cracks in the crust that cause earthquakes. According to the
U.S. Geological Survey, the stress factor on a surface, such as a fault plane, results from "forces applied perpendicular to the surface or from remote forces transmitted through the surrounding rock." Tensional Stress Rocks pulled apart are under tensional stress. Tensional stress is the major type of stress that occurs at plate boundaries. This type of stress happens when rocks stretch and become thin in the middle. Shear Stress Shear stress occurs when forces are parallel but move in opposite directions. This is the most common stress found at plate boundaries. Rocks are pushed in different directions, causing them to slip apart or change shape. Shear stress manifests as a seismic body wave that shakes the ground. Read more: ]
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Asked 7/19/2013 12:21:41 AM
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Updated 7/19/2013 5:40:40 PM
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