| Answer | Crossword Clue |
|---|---|
| felsites | a dense igneous rock consisting almost entirely of feldspar and quartz |
| felsite | dense, fine-grained, igneous rock consisting typically of feldspar and quartz, both of which may appear as phenocrysts |
| felsitic | dense, fine-grained, igneous rock consisting typically of feldspar and quartz, both of which may appear as phenocrysts |
| pegmatite | a coarsely crystallized rock commonly occurring in igneous intrusions, esp dykes, and consisting mainly of feldspar and quartz |
| pegmatites | PEGMATITE, a coarsely crystallized rock commonly occurring in igneous intrusions, esp dykes, and consisting mainly of feldspar and quartz |
| halleflinta | (Swedish) a dense rock containing quartz and feldspar |
| halleflintas | HALLEFLINTA, (Swedish) a dense rock containing quartz and feldspar |
