| NOUN | substance | volcanic rock | extrusive igneous rock solidified near or on the surface of the Earth |
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| Meaning | extrusive igneous rock solidified near or on the surface of the Earth. | |
|---|---|---|
| Narrower | agglomerate | volcanic rock consisting of large fragments fused together |
| amygdaloid | volcanic rock in which rounded cavities formed by expanding gas have subsequently become filled with mineral deposits | |
| basalt | The commonest type of solidified lava | |
| dacite | A grey volcanic rock containing plagioclase and quartz and other crystalline minerals | |
| lava | rock that in its molten form (as magma) issues from volcanos | |
| tuff, tufa | Hard volcanic rock composed of compacted volcanic ash | |
| volcanic glass | A kind of natural glass produced when molten lava cools very rapidly | |
| Broader | igneous rock | rock formed by the solidification of molten magma |
| Spanish | roca volcánica | |
| Catalan | roca volcànica | |
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