1. The city was entombed in volcanic lava.

2. The volcanic lava solidifies as it cools.

3. Pumice is produced in volcanic eruptions.

4. There have been several volcanic eruptions this year.

5. Volcanic activity is highly episodic in nature.

6. The place was recently visited by a serious volcanic eruption.

7. The volcano spewed out more scorching volcanic ashes, gases and rocks.

8. A cloud of volcanic ash is spreading across wide areas of the Philippines.

9. Volcanic activity has created thermal springs and boiling mud pools.

10. The rock is volcanic in origin.

11. Over 200 people have been killed by volcanic eruptions.

12. Molten volcanic lava solidifies as it cools.

13. The ridge consists entirely of volcanic rock.

14. The French Revolution was a volcanic upheavalin European history.

15. Volcanic ash showered down on the town after the eruption.

16. The violent volcanic forces upheaved the land of the whole area.

17. The vast volcanic slope was eerily reminiscent of a lunar landscape.

18. The islands are volcanic.

19. Fresh volcanic rocks are poor conductors of electricity.

20. While forests were being buried there was volcanic activity.

21. The central area is volcanic in origin.

22. Many oceanic islands are volcanic.

23. The finest fragments make volcanic ash and dust.

24. Chapter 3 Volcanic eruptions are difficult things to classify.

25. There are five major types of volcanic activity.

26. The volcanic eruption on Krakatoa had an explosive power equivalent to 20(sentencedict.com),000 tons of TNT.

27. The feldspars in volcanic lava flows can also be problematic.

28. The high level of radiation in the rocks implies that they are volcanic in origin.

29. Where oceanic lithosphere is subducted beneath another oceanic part of a plate the associated volcanic activity and produce an intra-oceanic island arc.

30. For example, many early human artifacts, such as arrowheads, are made of obsidian(Sentencedict), a volcanic glass.