8 Mass Movements, Wind,and Glaciers - A. C. Reynolds High ...

186 CHAPTER 8 Mass Movements, Wind, and Glaciers Figure 8-5A landslide occurs when a sheet of loose Earth materials sepa-rates from the bedrock and moves quickly downslope (A). In March of 1998, a landslide caused about 120,000 m3 of dirt and debris to flow into the Blackfoot River in Ovando, Montana. The river became well known after its por- ................
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