Geologists' understanding of colluvial geomorphology and sedimentology lags far behind most depositional systems, even though colluvium is one of the most widespread surficial deposits in the world. This session will highlight recent advances in colluvial sedimentology and the importance of colluvial sequences in reconstructing slope stability, seismic risk, paleoenvironments, climatic change, and land use. Wallace B. Woolfenden, USDA Forest Service, Swall Meadows, California. This session will bring together new paleoecological research from the Pacific northwest and southwest and the intermountain West. Vegetation dynamics relative to climate variability and disturbance regimes at decadal to millennial scales will be emphasized.
Climate forces a stochastic character on erosion and sedimentation.
Topography and channel networks impose spatial organization on the stochastic field of flux and storage. This session invites presentations on how probability distributions of erosion and deposition are constrained by climate and landscapes, and how landforms reflect frequency and magnitude of process rates. Sedimentary and tectonic evolution of the Lower Mississppi Valley. In tribute to Roger Saucier's lifework on the Quaternary geology of the Lower Mississippi Valley.