1.   A word here in passing about what actually goes to make up a typical volcanic eruption cloud.

2.   It turned out that that impact was not limited to volcanic eruptions.

3.   One of the ingredients it requires is hydrogen, a gas that is produced in great quantities during volcanic eruptions.

4.   The massive volcanic eruption could affect the climate of the whole planet.

5.   The Napa Valley, raised from the primordial sea, was formed by violent volcanic eruptions.

6.   Their campsites, graves, and houses had been buried and protected by a volcanic eruption.

7.   This time around, Dirk Pitt is nursing injuries sustained during a volcanic eruption.

8.   ...a huge cloud of gas and dust from the volcanic eruption.

9.   They know of many historic volcanic eruptions in the area.

10.   Volcanic eruptions invariably generate pyroclasts of a range of sizes.