Across
- 2. pea-sized material
- 4. a summit depression typically larger than 1 kilometer in diameter, produced by collapse following a massive eruption
- 7. walnut-sized material
- 10. materials fire fragments
- 11. source material for volcanic eruption
- 12. the resistance to flow
- 13. steep-walled depression at the summit, generally less than 1 kilometer in diameter
- 14. lavas occurring along divergent plate boundaries on the ocean floor
- 17. triggered by the collapse of volcanic landforms in the ocean
- 18. ejected as hot lava
- 21. magma rises through the crust
- 22. lavas rough, travel short distances
- 23. travel along bedding planes
Down
- 1. necks resistant vents left standing after erosion has removed the volcanic cone
- 3. rich in light silicates
- 5. mudflow from interaction with debris and water
- 6. cuts across bedding surfaces
- 8. eruptions fluid basaltic lava extrudes from crustal fractures called fissures
- 9. lava rough, jagged blocky texture
- 10. lava resembles a twisted or ropey texture
- 12. ash and aviation clouds of volcanic ash damage planes
- 15. forcibly injected between strata, can cause strata on top to rise
- 16. rich in dark silicates
- 19. opening connected to the magma chamber via a pipe
- 20. hardened or cooled lava