cave entrance
C30963
concept
A cave entrance is the opening in the earth’s surface that marks the transition from the outside environment into an underground cavern system.
All labels observed (2)
| Label | Occurrences |
|---|---|
| cave entrance canonical | 2 |
| recess cave | 1 |
Instances (3)
| Instance | Via concept surface |
|---|---|
| Carlsbad Cavern natural entrance | — |
| Ash Cave | recess cave |
| Natural Entrance | — |