Exam 5: Volcanoes

Which of the following is a good example of a shield volcano

Of the following volcanic landforms,one that is a stratovolcano

Rather than freely spreading,if the lava piles up close to the vent resulting in a structure that is steep-sided and compact is called a

In contrast to the mafic volcanism at rift zones,subduction zone lavas are lower in iron content but significantly higher in these

Of the following: various sulfur gases,hydrochloric acid,and carbon monoxide,only carbon monoxide is poisonous.

Construction on any active or dormant volcano in the United States is now prohibited by law because it would be so dangerous.

The largest and most violent Cascade volcano eruption was that of Mt.St.Helens in 1980.

A major concern about possible future eruptions of Mount Rainier is the potential for mudflow damage to nearby cities.

The 1883 Krakatoa,Indonesia eruption is more accurately classified as an

Volumetrically,the greatest production of new volcanic rock occurs at seafloor spreading ridges.

The damage from ash fall in the eruption of Mt.Pinatubo,Philippines in 1991 would have been worse,but fortunately,monsoon rains washed the ash off houses and hillsides.

Volcanic ash

The so-called Ring of Fire rimming the Pacific Ocean is really a ring of subduction zones.

The Soufriere Hills volcano on Montserrat in the Caribbean

The passage of magma up through the lithosphere may be traced by the shallowearthquake focal depths over time.

Explosive volcanoes can be so unpredictable that even volcanologists monitoring and studying them can be killed by unexpected eruptions.

Fast moving volcanic mudflow is formed as a result of the combination of water and volcanic ash results in

The path of a lava flow can to some extent be predicted; like any fluid,lava flows downhill.

The low-viscosity,fluid lava of hot-spot volcanoes is typically

The Volcanic Explosivity Index (VEI)is based on