| This igneous rock unit contrasts sharply with the typical sedimentary rocks that comprise the vast majority of the Canadian Rockies. |
| Mass spectrometer used to determine the proportions of isotopes contained in a sample of igneous rock. |
| The focus of their attention is ancient obsidian, a volcanic glass formed as an igneous rock. |
| The lava flow managed to spill over the cooled igneous rock but what little did was diverted away from the town. |
| Within the gaunt pinnacles, in colours that represent ores and igneous rock, Ancient Egyptians, Semites and Nabataeans have left evidence of passage. |
| These units, called igneous rock, or magma in their molten form, constitute major crustal additions. |
