| Basic: |
| A cliff is a type of vertical wall, minor terrain feature, vertical slope, high ground, and natural thing. |
| Documentation: |
| Comment: A specialization of Slope-Vertical and Wall-Vertical . Each instance of #$Cliff is a very steep, vertical or overhanging face on a mass of rock, earth, or ice. |
| Structure: |
| Every cliff has some spur as a physical part. Every cleft is in some cliff. Some base is in every cliff. |
| Size: |
- Every cliff is between 1 and 200 meters wide.
- Every cliff is between 20 and 3000 feet tall.
|
| Miscellaneous: |
- Every gorge is in some cliff.
- Every cliff dwelling borders on some cliff.
|
- The concept "rock climbing" is conceptually related to the concept "cliff".
- The concept "gorge" is conceptually related to the concept "cliff".
|
| Every cirque is surrounded by some cliff. No cliff is a landmass. Every cleft is in some cliff. |