Subsequent erosion by glaciers has created the final form of the mountains.

The bird shape is thought to have been due to recent cultivation and subsequent erosion.

The building up of mountains and their subsequent erosion?

Subsequent erosion left the craters sitting above the surrounding surface.

Subsequent erosion had lowered this to eight thousand, just low enough to make possible one of the features which made it memorable.

About 200 million years ago, this area was uplifted and subsequent erosion has created the current topography.

Volcanic activity and subsequent erosion have created impressive geological features.

The volcanic activity and subsequent erosion created impressive geological features.

Subsequent erosion lasting 300 million years stripped much of the exposed sediments and the mountains away.

Subsequent erosion contributed to the present pattern of parallel ranges divided by deep river valleys.