| Answer | Crossword Clue |
|---|---|
| halleflintas | HALLEFLINTA, (Swedish) a dense rock containing quartz and feldspar |
| halleflinta | (Swedish) a dense rock containing quartz and feldspar |
| felsites | a dense igneous rock consisting almost entirely of feldspar and quartz |
| felsitic | dense, fine-grained, igneous rock consisting typically of feldspar and quartz, both of which may appear as phenocrysts |
| felsite | dense, fine-grained, igneous rock consisting typically of feldspar and quartz, both of which may appear as phenocrysts |
