Across
- 4. Fiery pyroclastic flow made of hot gases infused with ash and other debris
- 6. resistant vents left standing after erosion has removed the volcanic cone
- 10. activity within a tectonic plate
- 11. steep-walled depression at the summit, generally less than 1 kilometer in diameter
- 14. gases One to six percent of a magma by weight
- 16. Fire fragments
- 18. lava (resembles a twisted or ropey texture)
- 21. Largest intrusive bodies
Down
- 1. Forcibly injected between strata
- 2. a summit depression typically greater than 1
- 3. lavas along divergent plate boundaries
- 5. Steep-walled depressions that are generally larger than 1 kilometer
- 7. Mudflow from interaction with debris and water
- 8. produced by collapse following a eruption
- 9. magma rises through crust
- 12. Fluid basaltic lava extruded from crustal fractures called fissures
- 13. opening connected to the magma chamber via a pipe
- 15. Basaltic (mafic): rich in dark silicates
- 17. lava (rough, jagged blocky texture)
- 19. the resistance to flow
- 20. Smaller pluton and