Author Question: Rivers downcutting into a land surface, in the absence of other forces, usually tend to erode a ... (Read 171 times)

Coya19@aol.com · **on:** Jul 13, 2018

Rivers downcutting into a land surface, in the absence of other forces, usually tend to erode a ________-shaped form when viewed in cross-section across its valley.

A) groove
B) V
C) U
D) flat bottomed
E) delta

Question 2

An imaginary surface extending beneath the continents which limits how deep streams may cut is ________.

A) grade
B) base level
C) traction
D) a trellis
E) a knickpoint