EARTH SCIENCE
STRUCTURAL GEOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Plunging fold makes an angle with the vertical axis causing a slanted/bent structure of rocks.
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Footing wall moves upward causing a displacement, this process is called thrust fault.
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Faults that sink toward each other is graben, while horst fault is slipping away from each other.
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Joints are caused by displacement on rocks.
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Detailed explanation-1: -There are three main types of fault which can cause earthquakes: normal, reverse (thrust) and strike-slip. Figure 1 shows the types of faults that can cause earthquakes. Figures 2 and 3 show the location of large earthquakes over the past few decades.
Detailed explanation-2: -Normal faults occur when two plates, one on top of the other, slide past each other and create the fault. Reverse faults occur when one plate slides under the other, creating a vertical offset. Strike-slip faults happen when two plates move horizontally past each other.
Detailed explanation-3: -Examples of grabens are the Jordan–Dead Sea depression and Death Valley. The Vosges Mountains of France and the Palestine Plateau are typical horsts.
Detailed explanation-4: -strike-slip fault-a fault on which the two blocks slide past one another. The San Andreas Fault is an example of a right lateral fault.