Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus |
pyroclastics  | |
|---|---|
| BT | igneous rocks |
| .volcanic rocks | |
| ..pyroclastics | |
| NT | andesite tuff |
| ash-flow tuff | |
| green tuff | |
| hyaloclastite | |
| ignimbrite | |
| pumice | |
| rhyolite tuff | |
| scoria | |
| tuff | |
| tuffite | |
| welded tuff | |
| UF | tephra |
| RT | agglomerate |
| sedimentary rocks | |
| clastic sediments | |
| glasses | |
| shirasu | |
| volcanic ash | |
| sediments | |
| clastic rocks | |
| ash falls | |
| volcaniclastics | |
| ash flows | |
| pyroclastic flows | |
| eruptions | |
| pyroclastic surges | |
| bentonite | |
| volcanic breccia | |
| ejecta | |
| lapilli | |
| SN | As of 1984, not to be used as sediments or sedimentary rocks. Use volcaniclastics when sediments or sedimentary rocks are made up partially of material originating from a volcano. Before 1981, also search pyroclastics and glasses. |
| pyroclastics and glasses | |
|---|---|
| SN | As of 1981, no longer a valid term for GeoRef. Use pyroclastics or glasses as applicable. See also volcaniclastics. |