| Answer | Crossword Clue |
|---|---|
| basanite | basaltic rock composed chiefly of plagioclase, olivine, and augite |
| picrite | granular igneous rock composed chiefly of olivine and augite, but containing small amounts of feldspar |
| monchiquite | a fine-grained rock composed of olivine and augite |
| monchiquites | MONCHIQUITE, a fine-grained rock composed of olivine and augite |
| limburgite | a volcanic rock composed of olivine and augite in a fine-grained or glassy groundmass |
| limburgites | LIMBURGITE, a volcanic rock composed of olivine and augite in a fine-grained or glassy groundmass |
