EARTH SCIENCE
STRUCTURAL GEOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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When the rocks change color.
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When the rocks form and create a landslide.
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When the rock layers combine to create a mountain.
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When rock layer bend under stress.
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Detailed explanation-1: -Fig. 10.7b: When an external force is applied to buried rocks under low confining pressure, such as near the surface of the earth, the rock typically deform by simple fracturing. This is known as brittle deformation.
Detailed explanation-2: -Compression squeezes rocks together, causing rocks to fold or fracture (break) (figure 1). Compression is the most common stress at convergent plate boundaries. Rocks that are pulled apart are under tension. Rocks under tension lengthen or break apart.
Detailed explanation-3: -An anticline is a fold that is arched upward to form a ridge; a syncline is a fold that arches downward to form a trough (Figure ). Anticlines and synclines are usually made up of many rock units that are folded in the same pattern.
Detailed explanation-4: -Parks and Plates. Folding-Folding occurs when tectonic processes put stress on a rock, and the rock bends, instead of breaking. This can create a variety of landforms as the surfaces of the folded rocks are eroded. Anticlines are folds shaped like an arch, and synclines are shaped like the letter ‘U.
Detailed explanation-5: -This occurs when forces from tectonic plates moving against each other cause the rocks to bend. Rock folding can either lift the rocks upwards or move them downwards, creating a variety of different landforms.