Achievement

Fuller, T.K.. et al, Field evidence for climate-driven changes in sediment supply leading to strath terrace formation: Along the South Fork of the Eel River in northern California, paleoerosion rates derived from 10Be concentrations in late Pleistocene strath terrace sediment are a factor of 2 greater than erosion rates derived from modern stream sediment and 3.5 times greater than paleoerosion rates from the Pleistocene-Holocene transition. Using these results as a proxy for sediment supply, we provide quantitative field-based evidence that extensive strath planation is linked to elevated sediment supply conditions. We have used optically stimulated luminescence (OSL) to date strath terrace sediment and find that the highest erosion rates and most extensive period of strath planation occurred during a period of increased precipitation in the late Pleistocene.