Exam 5: The Wrath of Vulcan: Volcanic Eruptions

The volcano in the image below is ________.

If magma is fracturing rocks as it moves through the subsurface,there would most likely be an increase in ________.

Compared to felsic lavas,mafic lavas have a ________.

Columnar joints form when ________.

Changes in the shape of a volcano can indicate ________.

Hotspots are produced by mantle plumes that are composed of mafic magma;however,Yellowstone is a hotspot that erupts more explosively because the hotspot ________.

In 79 C.E. ,the citizens of Pompeii in the Roman Empire were buried by pyroclastic debris derived from an eruption of ________.

Whether an eruption will primarily produce lava flows or pyroclastic debris is NOT influenced by the ________ the source magma.

The Hawaiian island chain is an example of a(n)________.

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

Volcanoes are considered dormant if they ________.

The Columbia River Plateau is an example of a ________.

List and describe two volcanic hazards,including both a description of the hazard and the possible effects of the hazard.

In 1902 a famous,deadly pyroclastic flow killed thousands of people on the Caribbean island of ________.

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