Exam 9: The Wrath of Vulcan: Volcanic Eruptions

Rhyolite lavas ________.

In 1902,a famous pyroclastic flow killed approximately 28,000 people on the Caribbean island of ________.

The largest known volcanic eruption in the last million years occurred at ________.

Which of the following magma compositions are most commonly erupted in continental arc settings?

The pillow basalts in the photo below most likely formed ____________.

Phreatic eruptions take place when ________.

What is the fundamental difference between an explosive and an effusive eruption? What variables are important in determining whether a volcano "flows" or "blows"?

If a volcano lies along a convergent boundary but has not erupted in over 100,000 years,the volcano is considered ________.

The vertical features preserved in the basalt flow in the image below formed because the lava ________.

Explosive or voluminous eruptions may cause a volcano to subside or collapse into the now-empty magma chamber,producing a broad depression termed a ________.

Viscous lava that accumulates above a vent in a bulbous mass creates a ________________

As compared to subaerial basaltic lavas,submarine basaltic lavas differ in that they ________.

Olympus Mons,the largest known volcano in our Solar System,is found on ________.

Lithified ash (or ash mixed with pyroclastic fragments)forms a volcaniclastic rock called a:

Recurrence intervals are often used as estimates of when the next eruption might occur.Explain what a recurrence interval is and how it is calculated.Why is a recurrence interval not the most useful means of forecasting eruptions?

Is it possible for scientists to predict eruptions? What are two ways in which geoscientists look for possible volcanic activity in the short term?

Describe how an explosive volcanic eruption can create a global cooling event.

Ash,cinders,and blocks are all types of ________.

Volcanism in Iceland is occurring as a result of ________.

Compared to felsic lavas,mafic lavas have a ________.