Where do mountain streams get most of their load of sediment?
A)Landslides,slope failures,and erosion of the mountain sides
B)Downward incision into bedrock
C)Abrasion of bedrock along the bottom of the channel
D)Alluvial fans

Question

Quizplus · Accepted Answer

Mountain streams get most of their load of sediment from landslides, slope failures, and erosion of the mountain sides. This is because the steep slopes of mountains are more susceptible to erosion and mass wasting processes, such as landslides and rockfalls, which contribute large amounts of debris to the streams. Additionally, the erosive power of the streams is enhanced by the steep gradients, allowing them to transport and deposit sediments downstream. While downward incision into bedrock, abrasion of bedrock along the bottom of the channel, and alluvial fans can also contribute to the sediment load of mountain streams, they are not the primary sources.

Where Do Mountain Streams Get Most of Their Load of Sediment