| These units, called igneous rock, or magma in their molten form, constitute major crustal additions. |
| As an added bonus, the lava would simultaneously pave roads and sidewalks when it hardens into a glassy smooth surface of igneous rock. |
| Within the gaunt pinnacles, in colours that represent ores and igneous rock, Ancient Egyptians, Semites and Nabataeans have left evidence of passage. |
| Rhyolite, extrusive igneous rock that is the volcanic equivalent of granite. |
| Mass spectrometer used to determine the proportions of isotopes contained in a sample of igneous rock. |
| The lava flow managed to spill over the cooled igneous rock but what little did was diverted away from the town. |
