| Answer | Crossword Clue |
|---|---|
| epidosite | a rock composed of epidote and quartz |
| epidosites | EPIDOSITE, a rock composed of epidote and quartz |
| arkosic | granular sedimentary rock composed of quartz and feldspar or mica; feldspathic sandstone |
| arkose | granular sedimentary rock composed of quartz and feldspar or mica; feldspathic sandstone |
| arkoses | granular sedimentary rock composed of quartz and feldspar or mica; feldspathic sandstone |
| greisens | hydrothermally altered rock of granitic texture composed chiefly of quartz and mica, common in the tin mines of Europe |
| greisen | hydrothermally altered rock of granitic texture composed chiefly of quartz and mica, common in the tin mines of Europe |
