OutlineOutline

• Planar Faults and Block Rotation

• Detachment Faulting

• Fault Linkage

• Kinematics of Normal Faulting

Normal Fault Systems and KinematicsNormal Fault Systems and Kinematics

Development of Continental Rift into Ocean Basin

East African Rift SegmentationEast African Rift Segmentation

Basin and Range Normal Fault BlocksBasin and Range Normal Fault Blocks

Rio Grande RiftRio Grande Rift Segmentation Segmentation

Death ValleyDeath ValleyFault Zone Fault Zone and Stepoverand Stepover

Closeup of StepoverCloseup of Stepover

Planar Normal Faults and Block Planar Normal Faults and Block

RotationRotation

Planar Normal Faults and Block Planar Normal Faults and Block

RotationRotation

Domino Block ExampleDomino Block Example

Domino Block ExampleDomino Block Example

Detachment FaultDetachment Fault

Detachment FaultDetachment Fault

Detachment FaultDetachment Fault

Soft-Linked SystemsSoft-Linked Systems

Kinematics of Normal FaultingKinematics of Normal Faulting

• Domino, Bookshelf-Style Normal Faulting

• Listric Normal Faulting with Reverse Drag

• Imbricate Listric Normal Faulting

• Inversion

Domino-Style Normal FaultingDomino-Style Normal Faulting

Domino-Style Normal Faulting (bookshelf Domino-Style Normal Faulting (bookshelf

faulting)faulting)

Occurs above DetachmentsOccurs above Detachments

Listric-Planar Normal Fault Listric-Planar Normal Fault

SystemSystem

???

Listric-Planar Normal Fault Listric-Planar Normal Fault

SystemSystem

L

Listric Normal Faulting with Reverse Listric Normal Faulting with Reverse

DragDrag

Listric Normal Faulting with RolloverListric Normal Faulting with Rollover

Occurs due to space problem with curved Occurs due to space problem with curved

detachmentdetachment

Imbricate Listric Normal FaultingImbricate Listric Normal Faulting

Synthetic faults also accommodate collapse of HW blockSynthetic faults also accommodate collapse of HW block

Imbricate Listric Normal FaultingImbricate Listric Normal Faulting

““Meatslices common in large displacement Meatslices common in large displacement

systemssystems

InversionInversion

• Normal faulting

• Syn-tectonic deposition of B

• Post-tectonic deposition of C

InversionInversion

• Normal faulting

• Syn-tectonic deposition of B

• Post-tectonic deposition of C

• Thrust faulting

• Deformation of B and folding of C

ReferencesReferences

Slides 1, 20, 21Slides 1, 20, 21Twiss, R. J. and E. M. Moores, Structural Geology, W. H. Freeman & Co., New York, 532 p., Twiss, R. J. and E. M. Moores, Structural Geology, W. H. Freeman & Co., New York, 532 p., 1992.1992.

Slides 3-6Slides 3-6http://earth.leeds.ac.uk/faults/normal/domino.htm

Slides 7-9Slides 7-9http://earth.leeds.ac.uk/faults/normal/detachment1.htm

Slide 10Slide 10http://earth.leeds.ac.uk/faults/soft/softnormal.htm

Slides 12-19Slides 12-19Davis. G. H. and S. J. Reynolds, Structural Geology of Rocks and Regions, 2nd ed., John Davis. G. H. and S. J. Reynolds, Structural Geology of Rocks and Regions, 2nd ed., John Wiley & Sons, New York, 776 p., 1996.Wiley & Sons, New York, 776 p., 1996.