Physical Geology lecture supplement - Mass wasting in the Big Horn Mountains.

The above digital photos of a slope in Shell Canyon of the Big Horn Mountains show an ongoing mass wasting event. If is evident as the light colored area, where movement has uprooted and covered the vegetation and exposed the soil and regolith that comprises the earth flow. A main scarp, where the material pulls away from the slope is evident, as is a compressional toe and marginal levees. Look carefully at the image on the left and see if you can recognize old earth flow scars. Below is an image of a person standing on the toe area which covers an old cow trail. This will be the site of an exercise on slope stability for the joint Iowa State, UNO, UNL field camp.

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