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Examination of exhumed faults in the western San Bernardino Mountains, California: Implications for fault growth and earthquake rupture

Posted on:2006-10-14Degree:M.SType:Thesis
University:Utah State UniversityCandidate:Jacobs, Joseph RFull Text:PDF
The late Miocene Cedar Springs fault system is a high-angle transpressional system in the Silverwood Lake area, western San Bernardino Mountains, southern California. This thesis presents the study of oblique-slip faults with modest amounts of slip, which represent the early stages of fault development. A structural and geochemical characterization is provided for six fault zones ranging from 39 m of slip to 3.5 km of offset in order to develop a model of fault zone geometry and composition. Basic geometric and kinematic results are provided for an additional 29 small-displacement (cm- to m-scale) faults. All slip-constrained faults are used to test for a correlation between thickness and slip. This thesis concludes that fault processes are similar throughout the different stages of development, and the study of relatively small-displacement faults can therefore be used to understand fault evolution through time and the processes of larger faults in the brittle crust.
Keywords/Search Tags:Fault
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