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Influence of climate on progressive hillslope failure in Redwood Creek Valley, northwestern California

January 1, 1983

Both creep and earthflow processes control hillslope erosion over large parts of the Redwood Creek basin. The type of process and displacement rates are largely dependent on underlying bedrock type and precipitation input. Progressive creep with rates ranging from 1.0 to 2.5 mm/a dominates on slopes west of the Grogen fault underlain by sheared and foliated schists. Movement appears to respond primarily to annual increments of precipitation. Complex earthflows occur predominantly on slopes east of the Grogen fault underlain by sheared graywacke and mudstone. Movement rates range from 3.0 to 131.0 mm/a and characteristically display dominant rainy season movement.

Publication Year 1983
Title Influence of climate on progressive hillslope failure in Redwood Creek Valley, northwestern California
DOI 10.3133/ofr83259
Authors Douglas N. Swanston, Robert Ruhl Ziemer, Richard J. Janda
Publication Type Report
Publication Subtype USGS Numbered Series
Series Title Open-File Report
Series Number 83-259
Index ID ofr83259
Record Source USGS Publications Warehouse
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