graben
/ˈɡrɑːbən/
noun
- A block of the Earth's crust that has dropped down between two faults, forming a valley or depression.
- A graben can create a flat valley floor surrounded by steep cliffs.
- Geologists studied the graben to understand the region's earthquake history.
- The Rhine Valley is a famous graben formed by tectonic activity.
Antonyms