folded mountain
In Geology this would be called an anticline.
syncline
syncline
An upward fold in rock that forms an arch-like structure is called an anticline. It is a type of fold in the Earth's crust where the rock layers are bent upwards in a convex shape, with the oldest rocks located at the core of the fold.
When a fold shape resembles an arch with the fold facing upwards, it is called an anticline. Anticlines are structural geologic features where the older rock layers are found in the center and the younger rocks are found on the outside.
An upward fold in the Earth's crust is called an anticline. It is characterized by layers of rock that are folded upward in an arch-like shape, with the oldest rocks in the center of the fold.
An arch in gymnastics is where you bend your back slightly so that you are shaped like "(" that.
synclines
basin
The "bullet" shape is called a Gothic arch. It is the evolution of the Romanesque arch which is just a semicircle, and has a number of structural advantages.
A trough-like fold of rock strata is known as a syncline. Synclines are downward-arching folds where the youngest layers are located in the center of the fold and the oldest layers are along the outer edges. They are typically U-shaped in appearance.
An upfold in rock layers is called an anticline. It is a type of fold in the Earth's crust where the layers of rock are folded upward in an arch-like shape.