A flat alluvium-floored valley with fairly steep walls and a stream beginning to meander would be in the ________ stage of the erosion cycle.
A) youth
B) mature
C) old age
D) peneplain
E) bajada

Question

Quizplus · Accepted Answer

In the youth stage, the valley would have a V-shaped profile with a narrow, steep-sided valley and a fast-flowing stream. In the mature stage, the valley widens, the stream begins to meander, and the profile becomes U-shaped. The walls are also less steep. In the old age stage, the valley floor is almost flat with a meandering stream and gentler slopes. Peneplain refers to an almost flat land surface that has undergone heavy erosion, while bajada refers to a sloping plain formed by the coalescence of multiple alluvial fans.

A Flat Alluvium-Floored Valley with Fairly Steep Walls and a Stream