What could cause a canyon to be deeper upstream than downstream?
A)The area upstream could be uplifted more than areas downstream.
B)The area upstream is higher above base level and so results in deep erosion.
C)A steeper gradient allows more erosion upstream.
D)All of these.

Question

What could cause a canyon to be deeper upstream than downstream? 
A)The area upstream could be uplifted more than areas downstream. 
B)The area upstream is higher above base level and so results in deep erosion. 
C)A steeper gradient allows more erosion upstream. 
D)All of these.

Quizplus · Accepted Answer

All of the given options could contribute to a canyon being deeper upstream than downstream. An area that is uplifted more could result in greater erosion upstream. Similarly, if the area upstream is at a higher elevation above the base level (such as a river or sea), it could result in deeper erosion. A steeper gradient could also lead to greater erosion upstream. Therefore, all of these options could be contributing factors to a canyon being deeper upstream than downstream.

What Could Cause a Canyon to Be Deeper Upstream Than