Fault Name |
State |
Chemult graben fault system (west) |
Oregon |
Comments |
The fault system forms the western, more active side of the Chemult graben. Two slip rate estimates are available for the graben, 0.05 mm/yr from 300 m of offset in 4.5-7 Ma volcanic rocks, and 0.4 mm/yr from 5- to 6-m-high scarps on latest Pleistocene (15 ka) deposits (Geomatrix Consultants, Inc., 1995). Dip of fault changed to 50? based on redefined regional default value (Lund, 2006). |
Selected References |
Geomatrix Consultants, Inc., 1995, Seismic design mapping, State of Oregon: Technical report to Oregon Department of Transportation, Salem, Oregon, under Contract 11688, January 1995, unpaginated, 5 pls., scale 1:1,250,000. Lund, W.R., ed., 2006, Basin and Range Province Earthquake Working Group seismic-hazard recommendations to the U.S. Geological Survey National Seismic Hazard Mapping Program: Utah Geological Survey Open-File Report 477, 23 p, ugspub.nr.utah.gov/publications/open_file_reports/OFR-477.pdf.
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