Clay Gouges in the San Andreas Fault System and their Possible Implications

  • F. T. Wu
  • L. Blatter
  • H. Roberson
Part of the Contributions to Current Research in Geophysics (CCRG) book series (CCRG)


In the northern and central sections of the San Andreas Fault Zone, and along Calaveras and Hayward faults, clay gouges have been found to occur on the surface and at shallow depths.

It is consistent with the available geochemical data that such gouges can exist at depths down to 10 km. If extensive gouge materials exist in a fault zone then their properties will determine, to a large extent, the behavior of the fault. From known properties of clays in the presence of water we can infer that, in such cases, the tectonic stress and the stress drops for earthquakes will be low and substantial creep will take place before earthquakes.


Clay Mineral Fault Zone Fault System Stress Drop Granitic Rock 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer Basel AG 1975

Authors and Affiliations

  • F. T. Wu
    • 1
  • L. Blatter
    • 1
  • H. Roberson
    • 1
  1. 1.Department of Geological SciencesState University of New YorkBinghamtonUSA

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