On a geologic map, if the contacts between sedimentary rock units form a series of parallel lines, with the youngest unit in the center, the underlying structure is a
A)horizontal anticline.
B)plunging anticline.
C)non-plunging syncline.
D)plunging syncline.

Question

Quizplus · Accepted Answer

A non-plunging syncline is characterized by parallel lines on a geologic map with the youngest rock units in the center, indicating a trough-like structure where layers dip towards the center.

On a Geologic Map, If the Contacts Between Sedimentary Rock