Faults & Folds and Earthquakes

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Last updated 12:59 AM on 9/3/26
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14 Terms

1
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What are the three main types of stress?

Tension, Compression, and shear

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Tension

Normal (Pulls apart)

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Compression

Reverse/thrust (Squeezes together)

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Shear

Strike-slip (Slide past)

5
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What is strain?

The change in rock due to stress.

6
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What are the three types of rock deformation?

Elastic(temporary change), ductile(bend/changes permanently), and brittle (breaks)

7
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What is a fault?

A fracture in a rock where the rocks on opposite sides have moved.

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What stress goes with each major fault?

Tension (normal), Compression (reverse), Sheer (strike slip)

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What is an oblique-slip fault?

Sideways and up/down

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What are folds?

Bends in rock layers

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What is an earthquake?

Sudden movement along a fault that releases energy (seismic waves)

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What are the focus and epicenter?

Focus: earthquake starts underground

Epicenter: a point directly above the focus

13
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What are P and S waves?

P: Fast waves & travels through solids/liquids

S: Slow waves & can not travel through liquids

14
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Difference between Magnitude and Intensity?

Magnitude: How large

Intensity:How strong