Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus |
underground cavities  | |
|---|---|
| RT | caverns |
| caves | |
| solution cavities | |
| geomorphology | |
| underground space | |
| volcanic features | |
| SN | Use solution cavities if applicable. Also see underground space for engineering geology. Added to Thesaurus in 1993. |