| Answer | Crossword Clue |
|---|---|
| tinguaites | TINGUAITE, a fine-grained igneous rock composed essentially of feldspar, nepheline and aegirine |
| tinguaite | a fine-grained igneous rock composed essentially of feldspar, nepheline and aegirine |
| syenites | A coarse-grained gray igneous rock composed mainly of alkali feldspar and ferromagnesian minerals such as hornblende |
| phonolites | A fine-grained volcanic rock composed of alkali feldspars and nepheline |
| phonolite | A fine-grained volcanic rock composed of alkali feldspars and nepheline |
| aplites | fine-grained granite composed essentially of feldspar and quartz |
| aplitic | fine-grained granite composed essentially of feldspar and quartz |
| aplite | fine-grained granite composed essentially of feldspar and quartz |
