In an alluvial fan,the coarsest material would be deposited
A)on the steep,upper slopes of the fan.
B)on the gentle,lower slopes of the fan.
C)approximately halfway between the steep slopes of the mountains and the gentle slopes of the plains.
D)where two fans interfere or overlap each other.

Question

Quizplus · Accepted Answer

The coarsest material in an alluvial fan is deposited on the steep, upper slopes of the fan because this is where the stream's velocity first decreases, causing the largest particles to settle out of the water first.

In an Alluvial Fan,the Coarsest Material Would Be Deposited