Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus |
concretions  | |
|---|---|
| BT | sedimentary structures |
| .secondary structures | |
| ..concretions | |
| RT | sedimentary rocks |
| sediments | |
| rhizoliths | |
| coal balls | |
| cone-in-cone | |
| geodes | |
| growth rates | |
| nodules | |
| septaria | |
| SN | As of 1981, used for nodules other than those on the ocean floor or in lakes. |