Contemporary Eolian Sediments in the Alpine Zone,Colorado Front Range

Particle-size distribution, mineralogy, sphericity, and weathering characteristics from eolian material deposited on four snow patches in the alpine zone of the Colorado Front Range are reviewed against information available on the role of eolian transport. A comparison is also made with particle-size distributions from various tundra surfaces and other soil-loss processes. The eolian deposits exhibit properties intermediate between those of loesses and cover sands. Eolian transport exhibits a sharp drop in competence from alpine ridge crest to valley bottom.