Anticlines and synclines are commonly seen rock formations ... An anticline is a convex fold in which the rock typically slopes upward. The oldest of rocks in an anticline are at its core.

but the strata are folded into a subsidiary syncline (the Gwesyn syncline) and anticline (the Rhiwnant anticline), with their axes parallel to that of the main structure; that is, from south-west ...

Rocks that have been bent are what geologists call folded. Examples of a fold is a syncline and an anticline. Rocks that have been shifted upward, downward or against each other is known as a ...