What are the differences between a rockfall, a rockslide and a rock avalanche?
Rock fall, rockslide, and rock avalanche are all composed of consolidated material. Rock falls occur on cliffs and the material free falls through the air. Rock slides move down as a unit (often along the boundary between 2 rock layers). Rock avalanches are a flow. The material moves downhill and jumbles up as it goes. All of these types of mass wasting are relatively fast. 32. Describe three common contaminants in groundwater. Leaking underground gasoline tanks Too many septic tanks Infiltration of herbicides or pesticides Leaching of heavy metals or other soluble material from landfills Salt water intrusion from overpumping 33. Sketch/describe a braided stream. What factors contribute to formation of a braided stream? Braided streams have multiple channels that overlap or cross each other. Braided streams occur in areas with variable water flow, easily eroded bank material, and lots of sediment. 34. Name 2 types of sand dunes and show the relationship of each to wind direction and av
