This is for a science project.
2006-11-06 10:20:00 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Earth Sciences & Geology
certainly NOT He!
The main one is water... along with other common volatiles CO2 and Cl. As these increase, so does explosiveness.
Higher silica lavas are more likely to be explosive.
2006-11-06 10:39:57 · answer #1 · answered by QFL 24-7 6 · 1⤊ 0⤋
The mineralogy of the melt. Shield volcanoes have a mineralogy of olivines, pyroxenes and calcium plagioclase. Olivines and pyroxenes have simple structures. Composite volcanoes have more developed silicates and when the necks get plugged up they explode like Mount St. Helens did in 1980. When a caldera occurs it is due to the amphiboles, micas, feldspars and quartz that sealed up their necks, and the structure of the mineralogy is quite complicated.
2006-11-07 18:41:37 · answer #2 · answered by Amphibolite 7 · 0⤊ 0⤋
The main thing that affects this is the dept of the heat source. There is a volcano called Reventidor when translated it means exploding volcano. It is much deeper about 25 to 30 miles deep.most are about 10 miles deep. if u can imagine the rock combinations that form at that dept,.when it comes to the surface it actually explodes.
2006-11-06 19:31:11 · answer #3 · answered by JOHNNIE B 7 · 0⤊ 2⤋
helium, naural gas hydrogen just to name a few
2006-11-06 18:33:50 · answer #4 · answered by Anonymous · 0⤊ 3⤋