| Basic: |
| A mountain range is a type of group of mountains, land topographical feature, and high mountainous terrain. |
| Documentation: |
| Comment: A specialization of LandTopographicalFeature . Each instance of #$MountainRange is a natural group of mountains. Instances of #$MountainRange include the RockyMountains, Andes-Mountains, and Alps-Mountains. |
| Structure: |
| Some valley and some mountain are in every mountain range. |
| Many summits and many valleys are in every mountain range. |
| Miscellaneous: |
| Every mountain range is high mountainous. |