How Do Rocks Respond to Stress?
ES1102  Stress Simulations

Environmental conditions for rocks can be separated into two broad categories: rocks near the surface experience conditions of relatively low temperature and pressure, while rocks deep underground experience conditions of relatively high temperature and pressure.

To help you visualize these two conditions, consider trying to mold two different lumps of clay, one that has been stored in a freezer and one at room temperature. Which of the two lumps would be more likely to respond with brittle deformation? Which one would deform in a ductile manner?

Consider the two types of deformation and the three types of stress. What structures do you think are likely to result from the six combinations?

  !   Choose an environmental condition for rocks, then select a type of stress to apply. Examine the animations and resulting structures for each combination.

2. Sketch the resulting structure for each animation. On your sketch, indicate the stress directions and conditions affecting deformation. Note the name of each structure.

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