The horizontal line that defines the portion of the anticline or syncline with the maximum curvature is known as the
A) valley.
B) hinge.
C) trough.
D) basin.

Question

Quizplus · Accepted Answer

The horizontal line that defines the portion of the anticline or syncline with the maximum curvature is known as the hinge. This is the line where the curvature of the fold is the greatest and the layers are the most tightly compressed. The other answer options, such as valley, trough and basin, do not accurately describe this feature of a fold.

The Horizontal Line That Defines the Portion of the Anticline