Evolution of Regional Stress State Based on Faulting and Folding Near the Pit River, Shasta County, California

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dc.contributor.advisorWeldon, Rayen_US
dc.contributor.authorAustin, Laurenen_US
dc.date.accessioned2013-10-10T23:20:04Z
dc.date.available2013-10-10T23:20:04Z
dc.date.issued2013-10-10
dc.description.abstractWe investigate the evolution of the regional stress state near the Pit River, northern California, in order to understand the faulting style in a tectonic transition zone and to inform the hazard analysis of Fault 3432 near the Pit 3 Dam. By analyzing faults and folds preserved in and adjacent to a diatomite mine north of the Pit River, we have determined principal stress directions preserved during the past million years. We find that the stress state has evolved from predominantly normal to strike slip and most recently to reverse, which is consistent with regional structures such as the extensional Hat Creek Fault to the south and the compressional folding of Mushroom Rock to the north. South of the Pit River, we still observe normal and strike slip faults, suggesting that changes in stress state are moving from north to south through time.en_US
dc.identifier.urihttps://hdl.handle.net/1794/13434
dc.language.isoen_USen_US
dc.publisherUniversity of Oregonen_US
dc.rightsAll Rights Reserved.en_US
dc.subjectfault hazarden_US
dc.subjectneotectonicsen_US
dc.subjectregional stressen_US
dc.titleEvolution of Regional Stress State Based on Faulting and Folding Near the Pit River, Shasta County, Californiaen_US
dc.typeElectronic Thesis or Dissertationen_US
thesis.degree.disciplineDepartment of Geological Sciencesen_US
thesis.degree.grantorUniversity of Oregonen_US
thesis.degree.levelmastersen_US
thesis.degree.nameM.S.en_US

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