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Outline: Normal Fault Systems and Kinematics Planar Faults and Block Rotation Detachment Faulting Fault Linkage Kinematics of Normal Faulting
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Development of Continental Rift into Ocean Basin
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East African Rift Segmentation
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Basin and Range Normal Fault Blocks
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Rio Grande Rift Segmentation
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Death Valley Fault Zone Fault Stepover
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Closeup of Stepover
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Planar Normal Faults and Block Rotation
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Domino Block Example
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Detachment Fault
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Soft-Linked Systems
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Kinematics of Normal Faulting Domino, Bookshelf-Style Normal Faulting Listric Normal Faulting with Reverse Drag Imbricate Listric Normal Faulting Inversion
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Domino-Style Normal Faulting
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Domino-Style Normal Faulting (bookshelf faulting) Occurs above Detachment faults
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Listric-Planar Normal Fault System ???
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Listric-Planar Normal Fault System L
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Listric Normal Faulting with Reverse Drag
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Listric Normal Faulting with Rollover Occurs due to space problem with curved detachment
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Imbricate Listric Normal Faulting Synthetic faults also accommodate collapse of HW block
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Imbricate Listric Normal Faulting “Meatslices common in large displacement systems
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Inversion Normal faulting Syn-tectonic deposition of B Post-tectonic deposition of C
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Inversion Normal faulting Syn-tectonic deposition of B Post-tectonic deposition of C Thrust faulting Deformation of B and folding of C
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References Slides 1, 20, 21 Twiss, R. J. and E. M. Moores, Structural Geology, W. H. Freeman & Co., New York, 532 p., 1992. Slides 3-6 http://earth.leeds.ac.uk/faults/normal/domino.htm Slides 7-9 http://earth.leeds.ac.uk/faults/normal/detachment1.htm Slide 10 http://earth.leeds.ac.uk/faults/soft/softnormal.htm Slides 12-19 Davis. G. H. and S. J. Reynolds, Structural Geology of Rocks and Regions, 2nd ed., John Wiley & Sons, New York, 776 p., 1996.
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