A feature commonly found in the youthful stage of a river is…
A. levee
B. meander
C. ox-bow lake
D. interlocking spur
ANSWER: OPTION D. interlocking spur
EXPLANATION: An interlocking spur, also known as an overlapping spur, is one of any number of projecting ridges that extend alternately from the opposite sides of the wall of a young, V-shaped valley down which a river with a winding course flows which is commonly found at the upper course of a river. Each of these spurs extends laterally into a concave bend of the river such that when viewed either upstream or from overhead, the projecting ridges, which are called spurs, appear to “interlock” or “overlap” in a staggered formation like the teeth of a zipper.
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