Lecture 8 - Mountain Building

Lecture 8 - Mountain Building - Lecture 8 Mountain Building...

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Lecture 8 Mountain Building
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Test Thursday September 22 Chapters 13 Earthquakes 14, 1 Earth’s Interior 2 Plate Tectonics 12 Volcanoes 7 Deformation, Folds, Faults, Mountain Building Bring your ID Old Tests on T-square
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Faults Faults are fractures (breaks) in rocks along which appreciable displacement has taken place 2 Types of faults Dip-slip fault Movement along the inclination (dip) of fault plane Strike-slip fault Dominant displacement is horizontal and parallel to the trend, or strike
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Parts of a Dip Slip Fault Hanging wall the rock above the fault surface Footwall – the rock below the fault surface
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Dip Slip Faults Two types of dip-slip faults Normal fault Hanging wall block moves down Associated with extension Prevalent at spreading centers/rifts Caused by tensional forces Reverse and thrust faults Hanging wall block moves up Caused by strong compressional stresses Reverse fault - dips greater than 45º Thrust fault - dips less than 45º
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hanging wall moves down relative to footwall
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Lecture 8 - Mountain Building - Lecture 8 Mountain Building...

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