When the arch is reversed, like this , it is called a syncline.
Looking north from the Central Downs over the Solent we are looking at a syncline.
We must lean together in the common struggle of life: the syncline is stronger than the anticline.
There each mountain-ridge corresponds to an anticline, and each valley to a syncline, or trough-shaped arrangement of strata.
"The porphyry dykes here are in syncline," the engineer went on.
The whole mountain is part of a syncline, the beds dipping into it from the north-west and south-east.
On the north shore of the Island the strata rise slightly on the northern side of the syncline.
A downfold, where the strata dip from either side toward the axis of the trough, is called a syncline (Fig. 170).
Hence the anticline noses out to the north and the syncline to the south.
A fold of rock layers that slope upward on both sides of a common low point. Synclines form 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. Compare anticline.