Question

Select all of the following features that you would find in an early stage stream.

A. Steep gradient
B. Low gradient
C. Moderate gradient
D. Some vertical with more lateral erosion
E. Mostly vertical erosion
F. Mostly lateral erosion
G. Heavy downcutting and rapids
H. Large floodplain
I. Moderate floodplain

Answer 1

Early stage streams are marked by a steep gradient, pronounced vertical erosion, and significant downcutting and rapids, reflecting a more youthful geomorphology.

Explanation:

Early stage streams:

A stream in an early stage typically features:

• A. Steep gradient
• E. Mostly vertical erosion
• G. Heavy downcutting and rapids

An early stage stream is characterized by a steep gradient which leads to a more energetic water flow and consequently, mostly vertical erosion. This form of erosion cuts deeply into the riverbed, producing distinctive features such as heavy downcutting and rapids. In contrast, a low gradient, large floodplain, and mostly lateral erosion are features typically found in more mature stages of a stream with a meandering course.