noun
- a large area of land that has been worn down by erosion to a nearly flat surface
Usage: geology
Examples
- The ancient peneplain stretched for hundreds of miles across the continent.
- Geologists studied the peneplain to understand the region’s erosional history.
- Over millions of years, the mountains were reduced to a peneplain.
- The peneplain showed evidence of multiple cycles of erosion and uplift.
- Rivers meandered slowly across the nearly level peneplain.
- The peneplain’s gentle slopes made it ideal for agriculture.