Swanson, F. J.; James, M. E. 1973. Recent geomorphic history in the area of experimental watersheds 1, 2, 3, 9 and 10, H.J. Andrews Forest. Seattle: University of Washington; Coniferous For. Biome Internal Rep. 67. 11 p.
Studies in the lower. Lookout Creek-Blue River area have revealed ageomorphic history including glaciation and the development of threealluvial surfaces, presently active alluvial cones and older, deeplydissected cone remnants. Results are based on landform mapping, anal-ysis of the types and distributions of surficial sediments, and thedistribution of Mazama ash. Presence of the ash makes it possible todate geomorphic features relative to a time horizon about 8,000 yearsin age. This work has served to identify individual cones which willbe studied further to learn the erosional histories of specific water-sheds.