Across
- 5. Intrusive, mafic rock.
- 9. Extrusive melt.
- 10. Coarse-grained texture.
- 11. "Strange-rock."
- 14. Largest intrusive structure.
- 15. Continental crustal rock.
- 16. Discontinuous series mineral.
- 19. Domed intrusive structure.
- 20. Reactionary geologist?
- 21. Small pluton.
Down
- 1. Intermediate igneous rock.
- 2. Igneous rock with exceptionally coarse texture.
- 3. Vesicular, glassy volcanic rock.
- 4. Continuous series mineral.
- 6. Common ultramafic color.
- 7. Small, tabular concordant intrusive structure.
- 8. Basalt's texture.
- 12. Intrusive melt.
- 13. Composition rich in magnesium and iron.
- 17. Obsidian's texture.
- 18. Small, tabular discordant intrusive structure.