Question

Which statement is true about folding in sedimentary rock layers?

A. Overturned folds have no trough.


B. Downfolds are called synclines.


C. Upfolds are called synclines.


D.Symmetrical folds are called monoclines.

Answer 1

The correct option is (B) Downfolds are called synclines.

Step-by-step explanation:

There are three basic types of folds (1) anticlines, (2) sync-lines and (3) monocline. Among these folds Sync-lines are formed when rocks are compressed by plate-tectonic forces. They can be as small as the side of a cliff or as large as an entire valley. Sync-lines are the folds of rock layers that slope downward on both sides of a common crest. So option B is the correct option.