Exam 8: Volcanic Activity

Why is topographic monitoring sometimes useful in forecasting a volcanic eruption?

At ________, Cameroon, a dense cloud of gas was released from a volcanic crater, flowing down the volcano and killing hundreds of people.

The shape of shield volcanoes is a function of

Volcanic gas emissions are important because they tell geologists how flammable the gases in the magma are likely to be.

________ are small volcanoes formed from tephra accumulation near a volcanic vent.

What is one reason that ash fall is such a significant hazard?

Mid-ocean ridge volcanism produces what type of volcanic rock?

The number of fatalities from the Mt. Pinatubo eruption was relatively low because

Volcanic domes form on oceanic plates above hotspots.

Seismic activity serves as a tool of volcanic forecasting because

________ is a volcanic gas associated with acid rain and vog.

Composite volcanoes are typically associated with subduction zones.

Composite cones typically are associated with what type of plate tectonic feature?

The eruption of Mt. ________ in 1991 killed several tens of people with pyroclastic flows.

________ are dangerous, hot masses of ash and gas that travel down the flanks of a volcano.

Ash flows are rarely dangerous.

Caldera eruptions are very common features of subduction zones.

Why are most active volcanoes associated with plate tectonic boundaries?

Volcanic domes typically consist of the rock type ________.

Why do composite volcanoes consist of alternating lava and pyroclastic layers?