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Faults and Faulting

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Faults and Faulting. Regional Strain. Types of Fault and the Principal Stresses. Fault Rocks. Gouge: non-cohesive, fine grained Breccia: coarse angular fragments Cataclasite: cohesive fragments Fault Melt (pseudotachylite): due to friction Mylonite: ductile-brittle fault zone.

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Faults and Faulting

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  1. Faults and Faulting

  2. Regional Strain

  3. Types of Fault and the Principal Stresses

  4. Fault Rocks • Gouge: non-cohesive, fine grained • Breccia: coarse angular fragments • Cataclasite: cohesive fragments • Fault Melt (pseudotachylite): • due to friction • Mylonite: ductile-brittle fault zone

  5. Fault scarp after an earthquake- Nevada

  6. Fault Striations- Slickenlines

  7. Fault zone brecciain QuartziteBrooks Range, AK

  8. Hydrothermal Fault Breccia Hydrothermal Fault Breccia

  9. Fault Melt Fault Melt

  10. Mylonites

  11. Evolution of an ActiveMountain Front

  12. New Mountains-Active Fault –Basin and Range Province

  13. Slot Canyon, Faulted Alluvial Fan- Death Valley

  14. Some Faults are Almost flat

  15. Faults in Reflection Seismic Data- Hope Basin, AK

  16. Interpreted Seismic Data 0 3 km

  17. The longer a fault, the more displacement it has

  18. Faults Symbols in Map View Decorations are on the hanging wall NormalFaults Thrust Faults

  19. Fault on a Geological Map

  20. Map View of FaultsSlip vs. Separation

  21. Separation : 2DIf layers are tilted it may be deceiving

  22. These are two dipping dikes that are faulted. What kind of fault is this?

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